013060   Kailas S;Khemalatha M;Saxena A (Nuclear Physics Div, Bhabha Atomic Research Centre, Mumbai-400 085, Email: kailas@cbs.ac.in) : Nuclear transmutation strategies for management of long-lived fission products. Pramana J Phys 2015, 85(3), 517-23.

Management of long-lived nuclear waste produced in a reactor is essential for long-term sustenance of nuclear energy programme. A number of strategies are being explored for the effective transmutation of long-lived nuclear waste in general, and long-lived fission products (LLFP), in particular. Some of the options available for the transmutation of LLFP are discussed.

2 illus, 2 tables, 15 ref

013059   Kailas S (Nuclear Physics Div, Bhabha Atomic Research Centre, Mumbai-400 085, Email: kailas@barc.gov.in) : Summary: 75 years of nuclear fission-present status and prspectives. Pramana J Phys 2015, 85(3), 555-60.

3 illus

013058   Johari A;Shrivastava B D;Prasad J;Srivastava K (School of Studies in Physics, Vikram Univ, Ujjain-456 010, Madhya Pradesh, Email: drjohariajita@gmail.com) : K absorption spectral studies of mixed ligand copper complexes with imidazole as one of the ligands. Indian J pure appl Phys 2015, 53(10), 664-9.

Copper K absorption spectra of nine copper(II) mixed ligand complexes with imidazole (ImH) as primary ligand have been recorded in the X-ray absorption near edge structure (XANES) region using 400 mm Cauchois spectrograph. The various parameters determined were position of inflection point of the absorption edge, principal absorption maximum and edge-width. The data for chemical shift of the absorption edge have been interpreted to yield the effective nuclear charge and the oxidation state of the metal ion in the complexes. The edge-widths have been correlated with the coordination geometry of the complexes. The main absorption edge has been found to split into two components and this has also been explained. The present results have been compared with those reported earlier from chemical studies. The effects of variation of the secondary ligands on the various parameters have also been discussed.

2 illus, 2 tables, 28 ref

013057   Jhingan A (NO, Inter Univ Accelerator Centre, P.O.Box 10502, New Delhi-110 067, Email: jhinganakhil@gmail.com) : Detector instrumentation for nuclear fission studies. Pramana J Phys 2015, 85(3), 483-95.

Study of heavy-ion-induced fusion-fission reactions require nuclear instrumentation that include particle detectors such as proportional counters, ionization chambers, silicon detectors, scintillation detectors, etc., and the front-end electronics for these detectors. Using the detectors mentioned above, experimental facilities have been developed for carrying out fusion-fission experiments. This paper reviews the development of detector instrumentation at IUAC.

12 illus, 26 ref

013056   Goyal A;Khatri I;Singh A K;Man Mohan (Physics and Astrophysics Dep, Delhi Univ, Delhi-110 007, Email: indu.khatri.du@gmail.com) : Relativistic fine structure and the energy levels of confined multi-electron GaAs quantum dot with hydrogenic impurity within the effective mass approximation in presence of magnetic field. Indian J pure appl Phys 2015, 53(9), 604-11.

Theory of ground state and excited state energies calculations of multielectron quantum dot with hydrogenic impurity within the effective mass approximation has been given. Results show that ground and excited state energies decrease with dot radius. In the present paper, calculation has been carried out for two electron quantum dot. The effect of magnetic field on first excited state for different values of m₁₁ and m₁₂ has been studied. In addition, the first order relativistic terms such as relativistic correction to the kinetic energy, Darwin and spin-orbit interaction term for first excited state have been investigated. According to the results obtained (i) Relativistic correction to kinetic energy, Darwin and spin-orbit interaction term approaches zero when dot size increases. (ii) The splitting between j=1/2 and j=3/2 due to spin-orbit interaction decreases by increasing dot size. (iii)The splitting between j=1/2 and j=3/2 due to spin-orbit interaction decreases by increasing depth of potential.

13 illus, 7 tables, 37 ref

013055   Giuseppe V;Davide C;Giancarlo N;Luca S; Francesco N;Stefano P;Simone S;Carlo T (Dipartimento di Fisica ed Astronomia, Univ di Padova, Via Marzolo 8, Padova I-35131, Italy, Email: giancarlo.nebbia@pd.infn.it) : Nuclear fission as a tool to contrast the contraband of special nuclear material. Pramana J Phys 2015, 85(3), 497-504.

Integrated mobile system for port security is presented. The system was designed to perform passive measurements of neutrons and γ-rays to search and identify radioactive and special nuclear materials as well as for the active investigations by using the tagged neutron inspection technique of suspect dangerous materials. The discrimination between difficult-to-detect uranium samples and high Z materials as lead was specifically studied. The system has been employed in laboratory detection tests and in a seaport field test.

5 illus, 4 ref

013054   Gherghescu R A;Poenaru D N (NO, Horia Hulubei National Institute for Physics and Nuclear Engineering (, P.O.Box MG-6, 77 125, Magurele-Bucharest, Romania, Email: radu@theory.nipne.ro) : Spontaneous fission of superheavy nuclei. Pramana J Phys 2015, 85(3), 439-46.

The macroscopic-microscopic method is extended to calculate the deformation energy and penetrability for binary nuclear configurations typical for fission processes. The deformed two-centre shell model is used to obtain single-particle energy levels for the transition region of two partially overlapped daughter and emitted fragment nuclei. The macroscopic part is obtained using the Yukawa-plus-exponential potential. The microscopic shell and pairing corrections are obtained using the Strutinsky and BCS approaches and the cranking formulae yield the inertia tensor. Finally, the WKB method is used to calculate penetrabilities and spontaneous fission half-lives. Calculations are performed for the decay of ^{282,292120 nuclei.}

2 illus, 2 tables, 8 ref

013053   Eman;Latif A;Saad M F (Food hygiene and control Dep, Cairo Univ, Faculty of Veterinary Medicine, Egypt) : Microbiological profile of leaking chicken table eggs. Int J Sci Nat 2015, 6(1), 51-5.

Chicken table eggs are used in a wide variety of foods. A total of 50 composite samples of leaking shell eggs were randomly collected from different markets in Cairo, Egypt. The mean pH value was 8.68 ± 0.17. The mean value of total colony count was 5.36x10^{6 ± 1.07x105cfu/gm, while the mean values of coliforms, Coagulase Positive Staphylococci and aerobic spore former counts were 2.61x107 ± 5.22x105 MPN/gm, 1.94x107 ± 3.88x105cfu/gm and 4.78x105 ± 9.56x103 cfu/gm respectively. Salmonellae failed to be detected in all examined samples. The public health and economical importance of isolated microorganisms were discussed.}

4 tables, 34 ref

013052   Dhiman C;Khan M S;Reddy M N (NO, , Physics Dep, Jamia Millia Islamia, New Delhi-110 025, Email: mskhan@jmi.ac.in) : Phase-shift cavity ring down spectroscopy set-up for NO₂ sensing: Design and fabrication. Def Sci J 2015, 65(1), 25-30.

Indigenously designed cavity ring down spectroscopy cell of 80 cm length of mild steel material was fabricated by attaching two 1" diameter high reflecting concave mirrors with reflectivity 99.997 % at 405 nm and radius of curvature was 1 m in specially designed mirror holding assemblies to the cell at two ends. Fine alignment of the resonator is facilitated with three tip-tilt adjusting screws to the mirror-mounting plate assembly. The PS-CRDS experimental set-up is evaluated by measuring the phase shift values corresponding to the absorption of NO₂ gas filled at low pressures in the cell. The limit of detection of pure NO₂ using the set-up under given conditions of Ar @ 50 mbar is estimated to be 1.50 x 10^{11 cm-3 and @ 60 mbar as 2 x 1011 cm-3.}

6 illus, 24 ref

013051   De France G;ET AL (NO, Grand Accelerateur Nationl d'Ions Lourds(GANIL), CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5, France) : The EXILL campaign. Pramana J Phys 2015, 85(3), 467-72.

Combination of germanium detectors was installed at the PF1B neutron guide of the ILL to perform prompt spectroscopy of neutron-rich nuclei produced in the neutron-capture induced-fission of ^{235U and 241Pu. In addition, LaBr₃ detectors from the FATIMA Collaboration were installed to complement with the EXOGAM clovers to measure lifetimes of low-lying excited states. The measured characteristics and online spectra indicate very good performances of the overall set-up.}

3 illus, 20 ref

013050   Danu L S;Biswas D C;Nayak B K;Choudhury R K (Nuclear Physics Div, Bhabha Atomic Research Centre, Mumbai-400 085, Email: isdanu@barc.gov.in) : Fission fragment mass distributions via prompt gamma-ray spectroscopy. Pramana J Phys 2015, 85(3), 379-84.

The distribution of fragment masses formed in nuclear fission is one of the most striking features of the process. Such measurements are very important to understand the shape evolution of the nucleus from ground state to scission through intermediate saddle points. The fission fragment mass distributions, generally obtained via conventional methods (i.e., by measuring the energy and/or the velocity of the correlated fission fragments) are limited to a mass resolution of 4-5 units. On the other hand, by employing the γ-ray spectroscopy, it is possible to estimate the yield of individual fission fragments. In this work, determination of the fission fragment mass distribution by employing prompt γ-ray spectroscopy is described along with the recent results on ^{238U(18O, f) and 238U(32S, f) systems.}

3 illus, 21 ref

013049   Chellapandi P;Rao P R V;Prabhat Kumar (NO, Bharatiya Nabhikiya Vidyut Nigam Limited, Kalpakkam 603 102, Email: pcp@igcar.gov.in) : Fast reactor programme in India. Pramana J Phys 2015, 85(3), 525-38.

Role of fast breeder reactor (FBR) in the Indian context has been discussed with appropriate justification. The FBR programme since 1985 till 2030 is highlighted focussing on the current status and future direction of fast breeder test reactor (FBTR), prototype fast breeder reactor (PFBR) and FBR-1 and 2. Design and technological challenges of PFBR and design and safety targets with means to achieve the same are the major highlights of this paper.

10 illus

013048   Bandyopadhyan A;Naik V;De Choudhury S;Mondal M;Chakrabarti A (NO, , Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata-700 064, Email: arup@vecc.gov.in) : ANURIB-Advanced National Facility for unstable and Rare Ion Beams. Pramana J Phys 2015, 85(3), 505-15.

An ISOL post-accelerator type of RIB facility is being developed at Variable Energy Cyclotron Centre (VECC), Kolkata, India. In this scheme, Rare Ion Beams (RIBs) will be produced using light ion beams (p, α) from the K=130 cyclotron, the RIB of interest will be separated from the other reaction products and accelerated up to about 2 MeV /u using a number of linear accelerators. Recently, a few RIBs have been produced and accelerated using this facility. As an extention of this effort, another RIB facility - ANURIB will be developed in a new campus as a green-field project. ANURIB will have two driver accelerators - a superconducting electron LINAC to produce n-rich RIBs using photofission route and a 50 MeV proton cyclotron for producing p-rich RIBs. In this paper, the status of the RIB facility in the present campus and future plans with the ANURIB facility will be discussed.

9 illus, 4 tables,13 ref

013047   Balasubramaniam M;Vijayaraghavan K R; Kathikraj C (Physics Dep, Bharathiar Univ, Coimbatore-641 046, Email: m.balou@gmail.com) : Ternary fission. Pramana J Phys 2015, 85(3), 423-30.

Presents the ternary fission of ^{252Cf and 236U within a three-cluster model as well as in a level density approach. The competition between collinear and equatorial geometry is studied by calculating the ternary fragmentation potential as a function of the angle between the lines joining the stationary middle fragment and the two end fragments. The obtained results for the 16O accompanying ternary fission indicate that collinear configuration is preferred to equatorial configuration. Further, for all the possible third fragments, the potential energy surface (PES) is calculated corresponding to an arrangement in which the heaviest and the lightest fragments are considered at the end in a collinear configuration. The PES reveals several possible ternary modes including true ternary modes where the three fragments are of similar size. The complete mass distributions of Si and Ca which accompanied ternary fission of 236U is studied within a level density picture. The obtained results favour several possible ternary combinations.}

4 illus, 19 ref

013046   Balabandki D L (NO, ELI-NP Project, IFIN-HH, 30 Reactorului Str, 077 125 Magurele, Jud, Ilfov, Romania, Email: dimter.balabandki@eli-np.ro) : Photofission experiments at the ELI-NP facility. Pramana J Phys 2015, 85(3), 473-81.

At ELI-NP, high-power lasers together with a very brilliant γ beam are the main research tools. The high-power laser system (HPLS) and the γ beam system (GBS) of ELI-NP are presented. The expected performance of the electron accelerator and production lasers of the GBS, and the targeted operational parameters of the γ beam are described. Possible laser-induced fission and γ beam photofission experiments which are under preparation at ELI-NP, and the different set-ups and instrumentation, are designed for these experiments, are presented.

3 illus, 23 ref

013045   Babitha K K;Sreedevi A;Priyanka K P;Sabu B; Varghese T (Physics Dep, Nanoscience Research Centre(NSRC), Nirmala College, Muvattupuzha-686 661, Email: nanocm@gmail.com) : Structural characterization and optical studies of CeO₂ nanoparticles synthesized by chemical precipitation. Indian J pure appl Phys 2015, 53(9), 596-603.

Cerium oxide (ceria) nanoparticles were synthesized using cerium nitrate and ammonium carbonate as precursors. As-synthesized CeO₂ powders were calcined between 400-850°C for 2 h. The samples were characterized by thermogravimetric analysis, X-ray powder diffraction, transmission electron microscopy, Fourier transform infrared, UV-Visible, photoluminescence and Raman spectroscopies. The FTIR spectrum exhibits strong broad band below 600 cm^{-1 which is due to Ce-O stretching mode to confirm the formation of pure CeO₂. It is shown that average particle size increases as calcination temperature is increased and the absorption is red shifted. PL studies observed that emission band is blue shifted and intensity of emission peaks decreases with increase in calcination temperature. Raman spectrum is characterized by the presence of a very strong band near 464 cm-1. The desired structural and optical properties of CeO₂ nanoparticles make it as a promising material for photocatalytic and optoelectronic applications.}

10 illus, 39 ref

013044   Azarm M R;Jafar Tafershi M;Fazli M;Jahangiri A (Faculty of Physics, Semnan Univ, Semnan, Iran, Email: MJ.Tafreshi@gmail.com) : Effect of crucible shape on the solution hydrodynamic in the growth of KTiOPO₄ single crystals by top-seeded solution growth method: a numerical analysis. Indian J pure appl Phys 2015, 53(10), 675-80.

Three-dimensional solution flow and temperature field simulations were performed to model the growth of KTiOPO₄ single crystals by TSSG method. Steady flow and temperature field for four crucible shapes were computed using finite volume method. Our results show the effect of crucible shape on axial flow which has direct effect on homogeneity of solution, morphology of crystal and mass transport during the growth of crystals from solution. In order to consider the simulation results, KTiOPO₄ single crystals were grown by TSSG method in crucibles with different shapes.

4 illus, 3 tables, 14 ref

013043   Alsabah Y A;Elbadawi A A;Siddig M A;Mohammed M I (Physics Dep, Faculty of science and technology, Al Neelain Univ, Khartoum, Sudan) : Synthesis and physica properties of the new double perovskite X2ALVO6 (X=Ca, Sr & Ba). Int J Sci Nat 2015, 6(1), 56-62.

Three members of the double perovskite materials X₂AlVO₆ (X = Ca, Sr and Ba) were synthesis by solid state interaction method. Crystal structure, optical and dielectrical properties calculations of these double perovskite materials were described. X- Ray Diffraction (XRD), Fourier Transform Infra Red (FTIR), Ultra Violet visible (UV), and Impeadence spectroscopies were used as analytical techniques. XRD measurements showed that these materials are crystallize in orthorhombic double perovskite structures with (Pnma) space group. Unit cell parameters, atomic positions, crystalline size and site occupancies were calculated by standared Rietveld method through the Fullprof program. Lattice parameters were a=b= 5.4798 armstrung and c = 7.7621 armstrung for Ca₂AlVO₆, a = b = 5.5518 armstrung and c = 7.8695armstrung for Sr₂AlVO₆ and a =b = 5.5759 armstrung and c = 7.89380 armstrung for Ba₂AlVO₆. The energy gap were calculated for Ca₂AlVO₆, Sr₂AlVO₆ and Ba₂AlVO₆, and found to be 4.16eV, 4.79eV and 4.87eV respectivily.

9 illus, 4 tables, 22 ref

012176   Virk N K;Vinayak K S;Suneel Kumar (School of Physics and Materials Sciences, Thapar Univ, Patiala-147 004, Email: kaur.physics@gmail.com) : Role of isopin momentum dependent interactions in extreme conditions. Proc Indian Natn Sci Acad 2015, 81(1), 95-9.

In the present study, the role of isospin in the momentum dependent interactions has been studied through the stopping observables. For this, the simulations have been carried out within the framework of IQMD and IQMD(Th01) model at the central collisions for various systems at an incident energy of 100 MeV/nucleon. The nucleonic interactions (momentum dependent) as a function of isospin marginally affect the density and temperature. This motivation will help to further investigate the role of iso-MDI on the other observables for the nuclear matter under extreme conditions.

2 illus, 11 ref

012175   Trejo Macotela F R;Sanchez Gaspariano L A; Montero C M;Sanchez A D;Murphy Arteaga R S;Barrientos A G;J M Rocha Perez (NO, Universidad Politecnia de Pachuca, Carretra Pachuca-Cd Shagun, Km 20, Rancho Luna, Ex-Hacienda de Santa Barbara, Zempoala, Hidalgo, Mexico, Email: luis.sanchezz@uppuebla.edu.mx) : Flipped voltage follower based low noise amplifier with 640 MHz BW at 2.26 GHz, 1.3 dB NF, 1.2V V_dd, and up to 10 dBm IIP3. Indian J pure appl Phys 2015, 53(8), 546-52.

Design, implementation and characterization of four Low Noise Amplifier architectures in a double poly, four metal layers, 0.35 μm CMOS technology from AMS AG biased at 1.2 V with a power consumption as low as 2.73 mW operating in a frequency band ranging from 1.94 to 2.58 GHz with Noise Figure around 1.3 dB and input intercept point up to 10 dBm are presented. With the performance exhibited by the proposed topologies, it is demonstrated that the use of the Flipped Voltage Follower structure is feasible to realize amplifiers at radio frequencies with low noise figure and good linearity performance preserving its characteristic low power consumption.

5 illus, 2 tables, 22 ref

012174   Tiwari V K (Physics Dep, Allahabad Univ, Allahabad-211 002, Email: vivekkrt@gmail.com) : Exploring the QCD Critical region in the QCD-Like two flavor models. Proc Indian Natn Sci Acad 2015, 81(1), 135-51.

Author have calculated the phase diagram for exploring the critical behavior around the critical end-point (CEP) and located the chiral limit existence of the tri-critical point (TCP) in the μ and T plane of the Polyakov loop extended Quark Meson Model (PQM) and the pure Quark Meson (QM) model which become effective Quantum-chromodynamics (QCD) like models due to the augmentation of the effective potential by the renormalized fermionic vacuum one loop fluctuation. These models yield the second order transition at μ = 0 on the temperature axis after incorporating the fermionic vacuum correction. The proximity of the TCP to the QCD critical end-point (CEP) has been quantified in the phase diagram. We have plotted the contours of appropriately normalized constant quark number susceptibility and scalar susceptibility around the CEP in different model scenarios. In order to investigate the qualitative as well as quantitative effect of the fermionic vacuum term and the Polyakov loop potential, on the critical behavior around CEP, we have compared the shape of these contours as obtained in different model calculations. Further, we have computed and compared the critical exponents resulting from the divergence of quark number susceptibility at the CEP in different model scenarios. The possible influence of the TCP on the critical behavior around CEP, has also been discussed.

6 illus, 64 ref

012173   Timur K;Artem A;Vladimir S K;Grigoriy L; Anastasia T;Anton S (NO, National Research Nuclear Univ"MEPhI"(Moscow Engineering Physics Insti, Kashirskoe Highway, 31, 115 409, Moscow, Russian Federation, Email: polynna@yandex.ru ) : Magnetically based hardware-software complex for wireless endoscope capsule control. Biosci Biotechnol Res Asia 2015, 12(2), 1273-80.

The technology of capsule endoscopy becomes very popular nowadays for its painlessness, effectiveness, usability and uniqueness. In this paper, a magnetically based controllable wireless endoscope capsule is reviewed. A capsule contains magnets in the shape of doughnuts, which enables to control it by means of magnetic setup and control panel. A setup contains superconducting magnet, which provides the high intensity of magnetic field, and this enables to examine patient of any constitution. The external control over the location of a capsule is conducted by the effect of low frequency or even steady magnetic field, which does not have side effect and is able to penetrate freely with biological tissue without significant weakening.

5 illus, 18 ref

012172   Thakur L;Kakade U;Patra B K (Physics Dep, Indian Institute of Technology, Roorkee-247 667, Email: thakurphyom@gmail.com) : Imaginary part of the medium modified heavy quark potential. Proc Indian Natn Sci Acad 2015, 81(1), 75-85.

Author have calculated the dissociation of quarkonia through an imaginary potential which is obtained by correcting both the perturbative and non-perturbative terms of the potential at T=0 through the dielectric function in real-time formalism. The real-part of the potential becomes stronger and thus makes the quarkonia more bound whereas the (magnitude) imaginary-part too becomes larger and thus contribute more to the thermal width, compared to the medium-contribution of the Coulomb term alone. We have also extended our calculation to anisotropic medium, by calculating the leading anisotropic corrections to the propagators in Keldysh representation. The presence of anisotropy makes the real-part of the potential stronger but the imaginary-part is weakened slightly and the competition between them results in higher dissociation temperatures compared to isotropic medium.

3 illus, 25 ref

012171   Srivastava B K (Physics & Astronomy Dep, Purdue Univ West Lafayette, Indiana, USA, Email: brijesh@purdue.edu) : De-Confinement and the clustering of color sources. Proc Indian Natn Sci Acad 2015, 81(1), 5-15.

Brief review of the color string percolation model (CSPM) is presented. The clustering of color sources provides a framework of the the partonic interactions in the initial stage of the collisions. The CSPM has described several observables in agreement with the experimental results e.g. multiplicity, elliptic flow at RHIC and LHC energies. The thermodynamical quantities temperature and the Equation Of State (EOS) are obtained in agreement with the Lattice Quantum Chromo Dynamics (LQCD) calculations. The shear viscosity to entropy density ratio (η/s) is obtained at RHIC and LHC energies. It is also observed that the inverse of η/s is equivalent to trace anomaly Δ = (ε - 3P)/T^{4 in excellent agreement with the recent LQCD calculations.}

8 illus, 29 ref

012170   Srivastava A M (NO, Institute of Physics, Bhubaneswar-751 005, Email: ajit@iopb.res.in) : Theory summary- international conference on matter at extreme conditions: then and now. Proc Indian Natn Sci Acad 2015, 81(1), 309-20.

This is a summary of theory presentations at the "International conference on matter at extreme conditions: then and now" which was held at Bose Institute, Kolkata in January, 2014.

14 illus, 4 ref

012169   Sotner R;Herencsaar N;Jerabek J;Vrba K;Dostal T;Jaikla W;Metin B (Radio Electronics Dep, Brno Univ of Technology, Technika 3082/12, 616 00 Brno, Czhec Republic, Email: winai.ja@hotmail.com) : Novel first-order all-pass filter application of z-copy voltage differencing current conveyor. Indian J pure appl Phys 2015, 53(8), 537-45.

Application of z-copy voltage differencing current conveyor (ZC-VDCC) in simple and interesting first-order all-pass sections has been studied in the present paper. The solutions presented here have presumptions for direct electronic control. Some of proposed circuits offer curious possibilities of control. Electronic controllability of the VDCC allows simultaneous zero and pole frequency adjusting, separated zero or pole frequency adjusting or migration of zero from left half plane to right half plane of complex space. Behavioral models of VDCC based on commercially available devices are proposed and selected type of all-pass section was verified by simulations and also by measurements. Results of simulations, experiments, and theoretical proposal are compared. Experiments confirm workability of proposed behavioral equivalent circuit in bandwidths to units of MHz.

14 illus, 34 ref

012168   Singh S S;Jha A K;Gupta K K (Physics and Astrophysics, Delhi Univ, Delhi-110 007, Email: agamjha2001@yahoo.co.in) : Modified Surface Tension of a QGP-Droplet under one loop correction in peshier potential. Proc Indian Natn Sci Acad 2015, 81(1), 174-8.

Under one loop correction in Peshier potential surface tension of a Quark-Gluon Plasma (QGP) droplet has been recomputed. The correction reduces the stable size of a QGP droplet. The value of surface tension obtained here is in better agreement with the current lattice result.

1 table, 20 ref

012167   Singh R;Dinesh Kumar;Tripathi C C (Electronics and Communicaation Engineering Dep, Univ Institute of Engineering & Technology, Kurukshetra Univ, Kurukshetra, Email: mr_rindhir_singh@yahoo.co.in) : Graphne: Potential material for nanoelectronics applications. Indian J pure appl Phys 2015, 53(8), 501-13.

Owing to Moore's law and the advancements in microelectronics, the industry is shifting to nanoelectronics. The materials used for nanoelectronics applications are termed as nanomaterials recognized as the one which has at least one dimension less than 100 nm. Nanoelectronics allows bottom-up approach in contrast to the top-down approach adopted in microelectronics. So in nanoelectronics, the approach is to design systems using nanomaterials as basic building blocks. The importance of nanoelectronics is that different nanomaterials exhibit certain unusual properties not available at the micro scale. These unusual properties of the nanomaterials are utilized in a wide range of electronic applications like sensors, FETs, photovoltaic cells and many other exotic electronic devices applications. Graphene is one of the most recently discovered nanomaterial known for its exceptional mechanical, electrical, optical properties which are not found in any other material in the world. Being the thinnest, strongest, stiffest and the most conducting material in the world, therefore, its various applications are postulated in this review paper. A lot of research is being done around the world to find a graphene synthesis method which is facile, easy and economical so that graphene can be produced at large scale with least defects. Graphene is ready to replace silicon in almost all the semiconductor devices in order to enhance their capabilities. Till now graphene has been used in electronics applications like Li-ion batteries, photovoltaic cells, supercapacitors etc. In the present paper, various methods of synthesizing graphene, its properties, and work being carried out in the researcher's laboratory is presented.

^iia19 illus, 2 tables, 23 ref

012166   Shukla P (Nuclear Physics Div, Bhabha Atomic Research Centre, Mumbai, Email: pshuklabarc@gmail.com) : Overview of quarkonia and heavy flavour measurements by CMS. Proc Indian Natn Sci Acad 2015, 81(1), 199-206.

This writeup summarizes the recent CMS results on quarkonia measurements in pp, pPb and PbPb collisions at LHC. The excellent muon detection capability of CMS allows measurement of charmonia states at high transverse momentum (p_T) while the ⊥ states can be reconstructed starting at zero pT. The absolute and relative yields of different charmonia and bottomonia states modified in PbPb collisions (over pp collisions) are described. The vertexing capability of CMS enables measurement of B meson energy loss via its decay to J/ψ. An overview of these measurements is given. How these measurements compare with other experiments at RHIC and LHC and have improved the understanding of heavy ion collisions has been discussed.

6 illus, 24 ref

012165   Sarkar S (NO, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai-400 005, Email: sreemoyee.sarkar@tifr.res.in) : Effect of flow on heavy quark damping rate in hot QCD plasma. Proc Indian Natn Sci Acad 2015, 81(1), 107-15.

Authors determine an expression for the heavy quark damping rate in a viscous QCD plasma using kinetic theory. Shear flow in a medium changes both boson and fermion distribution functions which eventually modify heavy quark damping rate. In presence of non-zero velocity gradient in the medium all the bath particles are out of equilibrium. In this scenario we estimate the first order correction in (O(η/s)) for the damping rate. The transverse domain remains infrared divergent even after hard thermal loop corrections as one encounters in case of ideal plasma.

1 illus, 24 ref

012164   Sarkar R;Mondal P K;Chatterjee B K (Physics Dep, Bose Institute, 93/1 APC Road, Kolkata-700 009, Email: sarkar_rupa2003@yahoo.com) : Alternative method for the measurement of neutron flux. Pramana J Phys 2015, 85(4), 685-90.

Simple and easy method for measuring the neutron flux is presented. This paper deals with the experimental verification of neutron dose rate-flux relationship for a non-dissipative medium. Though the neutron flux cannot be obtained from the dose rate in a dissipative medium, experimental result shows that for non-dissipative medium one can obtain the neutron flux from dose rate. We have used a ^{241 AmBe neutron source for neutron irradiation, and the neutron dose rate and count rate were measured using a NM2B neutron monitor and R-12 superheated droplet detector (SDD), respectively. Here, the neutron flux inferred from the neutron count rate obtained with R-12 SDD shows an excellent agreement with the flux inferred from the neutron dose rate in a non-dissipative medium.}

3 illus, 22 ref

012163   Rao N A;Shivalingaswamy T;Kagali B A (NO, Government First Grade College, Kadugudi, Bangalore-560 067, Email: tssphy@gmail.com) : Relativistic rotational spectra of diatomic molecules. Indian J Theor Phys 2014, 62(1-2), 19-34.

In this article, the energy spectrum of a relativistic rotor has been worked out using the Klein Gordon Hamiltonian. Relativistic corrections to the spectral lines of homo-nuclear as well as hetero-nuclear diatomic molecules have been derived. It is shown how to obtain relativisitically correct moments of inertia and bond lengths from the rotational constants determined from the spectral lines of diatomic molecules.

5 ref

012162   Rajotia D;Jat R N (Mathematics Dep, Rajasthan Univ, Jaipur-302 004, Email: rajotia.dinesh@gmail.com) : Dual solutions of three dimensional viscous flow and heat transfer due to a shrinking sheet with slip and suction. Indian J pure appl Phys 2015, 53(8), 514-20.

In the present paper, an analysis is presented to study the effect of slip and suction on the dual nature of the solution of the three dimensional boundary layer flow of an incompressible fluid and heat transfer towards a porous axisymmetric shrinking sheet. The governing equations are transformed into self-similar non-linear ordinary differential equations by using suitable similarity transformations and then the transformed equations are solved numerically using the shooting technique with Runge-Kutta forth order method. The numerical results of velocity and temperature profiles as well as skin-friction coefficient and Nusselt number are obtained and displayed graphically with different pertinent parameters to show interesting aspects of the solution. The investigation explores the conditions of the non-existence, the existence and duality of the similarity solutions which depend on the suction parameter S as well as slip parameter λ. The dual solutions exist in a certain domain of suction parameter S and due to an increment in the slip parameter λ, the domain of S where the similarity solution exists, also increases. Also, for increasing values of S and λ, the thickness of the both momentum and thermal boundary layer is decreasing for the first solution while for second solution it is increasing.

9 illus, 1 table, 35 ref

012161   Pruneau C (Physics and Astronomy Dep, Wayne State Univ, 666 West Hancock, Detroit, Michigan, 48152 usa, Email: pruneau@physics.waynne.edu) : Multiple facets of correlation functions. Proc Indian Natn Sci Acad 2015, 81(1), 40-50.

I will review studies of fluctuations and correlations carried out over the last 20 years and hopefully provide some insights for new measurements.

5 illus, 49 ref

012160   Prasanth J P;Bannur V (Physics Dep, Calicut Univ, Kerala-673 635, Email: prasanthjp36@gmail.com) : Hadron Formation in a Non-Ideal Quark Gluon Plasma using Mayer's method of Cluster Expansion. Proc Indian Natn Sci Acad 2015, 81(1), 158-64.

This work investigates the applicability of using the Mayer's cluster expansion method to derive the equation of state (EoS) of the quark-antiquark plasma. Dissociation of heavier hadrons in QGP is studied. The possibility of the existence of quarkonium after deconfinement at higher temperature than the critical temperature T <62> T_c is investigated. The EoS has been studied by calculating second and third cluster integrals. The results are compared and discussed with available works.

4 illus, 15 ref

012159   Prasad S K;Das S;Ghosh S K;Ghosh P;Muhuri S; Nayak T K;Ray R (NO, Bose Institute, Centre for Astroparticle Physics and Space Science, Kolkata-700 091, Email: sprasad@cern.ch) : 'Soft' and 'Hard' interactions in proton-proton collisions at LHC energies. Proc Indian Natn Sci Acad 2015, 81(1), 213-16.

Authors present a study of the properties of 'soft' and 'hard' events using PYTHIA 6.425 (Sjostrand et al., 2006) in proton-proton (pp) collisions at centre-of-mass energies (√s) 0.63, 0.9, 1.8, 2.76 and 7 TeV. Events are classified into 'soft' and 'hard', based on the presence of a jet. The multiplicity and transverse momentum (pT ) distributions of charged particles at midrapidity are studied for both 'soft' and 'hard' events as a function of √s. No significant change in the charged particle multiplicity and pT distributions are observed with √s for 'soft' events, indicating that the increase in √s mostly contributes to the increase in the fraction of 'hard' events.

2 illus, 7 ref

012158   Podlaha M F (NO, , Marktplatz-15, D-94065, Waldkirchen, Germany) : Physical space and universality. Indian J Theor Phys 2014, 62(1-2), 1-8.

14 ref

012157   Paul D (NO, Saha Institute of Nuclear Physics, Kolkata-700 064, Email: biswarup.paul@saha.ac.in) : Inclusive J/Ψ and Ψ(2S) production in pp and p-Pb collisions at forward rapidity with ALICE at the LHC. Proc Indian Natn Sci Acad 2015, 81(1), 179-85.

ALICE Collaboration has studied inclusive J/ψ and ψ(2S) production at forward rapidities in pp collisions at √ = 7 TeV with the ALICE Muon Spectrometer. The analysis has been carried out on a data sample corresponding to an integrated luminosity L_int = 1.35 pb^{-1. The production cross-sections of J/ψ and ψ(2S), integrated over the transverse momentum (0 <60> p_T <60> 20 GeV/c) and rapidity (2.5 <60> y <60> 4), have been measured. The J/ψ and ψ(2S) differential cross-sections, in transverse momentum and rapidity, have also been measured, significantly extending the pT reach of previous measurements performed in the same y-range. The results have been compared with the previously published ALICE results (L_int = 15.6 nb-1) and also with the measurement performed by the LHCb Collaboration. The ψ(2S)/J/ψ ratio, integrated over p_T and y, has been measured. This ratio has also been evaluated as a function of transverse momentum and rapidity and compared with the LHCb measurement. Finally, recent results on cross-sections, ψ(2S)/J/ψ production ratio, nuclear modification factor (R_pp_b) and forward-to-backward yield ratio (R_FB) in p-Pb collisions at √sNN = 5.02 TeV will be discussed.}

5 illus, 11 ref

012156   Nag S;Ananda D B;Maity I;Das T K (Physics Dep, Sarojini Naidu College for Women, Kolkata-700 028, Email: sankhasubhra_nag@yahoo.co.in) : Development of secular instability in different disc models of black hole accretion. Proc Indian Natn Sci Acad 2015, 81(1), 267-71.

Analytical treatment of black hole accretion generally presumes the stability of the stationary configuration. Various authors in past decade actually demonstrated the validity of such an assumption at least for inviscid hydrodynamic flow. Inviscid condition is a reasonable approximation for low angular momentum advection dominated flow in connection to certain supermassive black holes at the centres of the galaxies (including our own) fed from a number of stelar donors. Introduction of a weak viscosity, however, may sometimes provide a more detail understanding of the observed spectrum. But recently, some of the authors demonstrated that an introduction of slightest amount of viscosity in quasi-viscous form makes a stationary accretion disc (in vertical equilibrium model) unstable. We made the same sort of analysis in other disc models for quasi-viscous models under post-Newtonian scheme. We introduced perturbations on the stationary flow solution particularly in standing wave form and studied their time evolution to observe whether they grow with time. Our analysis shows that same sort of secular instability exists in other disc models too. We further argued that with sufficiently low value of viscosity in the realistic Astrophysical perspective the instability does not effectively jeopardise the stationary condition.

6 ref

012155   Mondal K;Sarkar S;Samadder P;De S;Sarkar P P (Engineering and Techonological Studies Dep, Kalyani Univ, Kalyani-741 235, Email: parthabe91@yahoo.co.in) : Broadband microstrip patch antenna of reduced sized for multiband applications. Indian J pure appl Phys 2015, 53(8), 553-6.

Small size wideband microstrip patch antenna is designed for S,C and X-band applications. The proposed antenna has been designed by a simple metallic patch and modified ground plane on dielectric substrate. In the ground plane, three rectangular slits are incorporated to obtain a large bandwidth of 140% (1.88 to 10.58 GHz). The proposed antenna may also be used as a multiband antenna by shifting the feeding position. The multiple numbers of frequency bands are achieved with percentage bandwidth of 80, 38, 32, 15 and 13%, respectively. The proposed antenna is simulated using Ansoft designer software. The simulated results are verified with the experimental data by standard microwave bench and network analyzer.

12 illus, 2 tables, 12 ref

012154   Mitra S;Sarkar S (Theoretical Physics Div, Variable Energy Cyclotron Centre, 1/AF Bidhannagar Kolkata-700 064, Email: sukanyam@vecc.gov.in) : Medium effects on the transport coefficients of a hot pion gas. Proc Indian Natn Sci Acad 2015, 81(1), 128-34.

Transport coefficients of a hot pion gas is evaluated in relativistic kinetic theory approach. The shear and bulk viscosities as well as the thermal conductivity of a pion gas are obtained by solving the relativistic transport equation in the well known Chapman-Enskog approximation. The in-medium propagator of the p and σ mesons at finite temperature is used to evaluate the π-π scattering amplitude in the medium. The real and imaginary parts of the self-energy calculated from one-loop diagrams using the tools from thermal field theory, are seen to have noticeable effects on the scattering cross section. The effect of early chemical freeze out in heavy ion collisions is implemented through a temperaturedependent pion chemical potential. These are found to affect the temperature dependence of the bulk and shear viscosities and as well as the thermal conductivity in a significant way.

4 illus, 16 ref

012153   Mirazadeh M;Eslami M;Biswas A (Engineering Sciences Dep, Faculty of Technology and Engineering, Guilan Univ, East of Guilan, Rudsar, Iran, Email: mirzazadehs2@guilan.ac.ir) : Computational method for the solution of one-dimensional nonlinear thermoelasticity. Pramana J Phys 2015, 85(4), 701-12.

In this paper, one of the newest analytical methods, new homotopy perturbation method (NHPM), is considered to solve thermoelasticity equations. Results obtained by NHPM, which does not need small parameters, are compared with the numerical results and a very good agreement is found. This method provides a convenient way to control the convergence of approximation series and adjust convergence regions when necessary. The results reveal that the proposed method is explicit, effective and easy to use.

2 illus, 31 ref

012152   Mazumder S;Bhattacharyya T;Alam Jan-E (NO, Variable Energy Cyclotron Centre, Kolkata, Email: surasree.mazumder@gmail.com) : Effect of gluon radiation off charm quark on transport coefficients and the equilibrium distribution of charm quark. Proc Indian Natn Sci Acad 2015, 81(1), 223-7.

The transport coefficients like drag, transverse and longitudinal diffusion have been evaluated when charm quark scatters elastically as well as suffers gluon bremsstrahlung while propagating inside Quark Gluon Plasma (QGP). The effect of the gluon radiation has been observed to be significant on the magnitude of different transport coefficients and on the equilibrium distribution function of the charm.

4 illus, 6 ref

012151   Mani Nath N;Das M K;Sarma J K (Physics Dep, Tezpur Univ, Tezpur-784 028, Email: nmn@tezu.ernet.in) : Regge-like initial input and evolution of non-singlet structure functions from DGLAP equation up to next-next-to-leading order at low x and low Q<. Pramana J Phys 2015, 85(4), 629-37.

This is an attempt to study how the features of Regge theory, along with QCD predictions, lead towards the understanding of unpolarized non-singlet structure functions F2^{NS(X, Q2) and xF₃(x, Q2) at low x and low Q2. Combining the features of perturbative quantum chromody-namics (pQCD) and Regge theory, an ansatz for F₂NS(x, Q2) and xF₃(x, Q2) structure functions at small x was obtained, which when used as the initial input to Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) equation, gives the Q2 evolution of the non-singlet structure functions. The non-singlet structure functions, evolved in accordance with DGLAP evolution equations up to next-next-to-leading order are studied phenomenologically in comparison with the available experimental and parametrization results taken from NMC, CCFR, NuTeV, CORUS, CDHSW, NNPDF and MSTW Collaborations and a very good agreement is observed in this regard.}

3 illus, 40 ref

012150   Majumder S (NO, Bose Institute, Kolkata, Email: sarbanimajumder@gmail.com) : Beta equilibrated quark matter in PNJL model. Proc Indian Natn Sci Acad 2015, 81(1), 272-6.

Authors present a first case study of the phase diagram of 2+1 flavor strongly interacting matter in β-equilibrium using the Polyakov - Nambu - Jona-Lasinio (PNJL) model. Phase diagram, charge neutral trajectories, isentropic trajectories and the equation of states are discussed and compared with the corresponding situation in the NJL model.

5 illus, 7 ref

012149   Liu W;Chen K (College of Mathematics and Statistics, Nanjing Univ of Information Science and Technology, Nanjing 210044, China, Email: wjliu@nuist.edu.cn) : Blow-up of solutions for the sixth-order thin film equation with positive initial energy. Pramana J Phys 2015, 85(4), 577-82.

In this paper, a sixth-order parabolic thin film equation with the initial boundary condition is considered. By using the improved energy estimate method and by constructing second-order elliptic problem, a blow-up result for certain solution with positive initial energy is established, which is an improve over the previous result of Li and Liu.

19 ref

012148   Liang R;Tan X;Zhou H;Wang S (School of Sciences, Beijing Univ of Posts and Telecommunications, Beijing 100876, China, Email: shwang@bupt.edu.cn) : Efficient parallel pseudorandom bit generator based on an asymmetric coupled chaotic map lattice. Pramana J Phys 2015, 85(4), 617-27.

In this paper, an asymmetric coupled map lattice (CML) combining sawtooth map as a local map is presented and its chaotic behaviours are analysed. Based on this asymmetric CML, a pseudorandom bit generator (PRBG) is proposed. The specific parameters of the system that make complicated floating-point computation and multiplication computation transform into simple shift bit operations are adopted, that not only ensures the nonlinear operations, but also increases the performance efficiency. The PRBG is implemented in software and hardware. The parallel output bit sequences pass all of the NIST SP800-22 statistical tests.

4 illus, 4 tables, 22 ref

012147   Lee Su H;Cho S (Physics and IPAP, Yonsei Univ, 50 Yonsei-ro, Seodaemun-gu, Seoul-120 749, Korea, Email: suhoung@yonsei.ac.kr) : U_A(1) Breaking effects and η at finite temperature. Proc Indian Natn Sci Acad 2015, 81(1), 116-26.

In this talk proceeding, we will discuss the relation between chiral symmetry and the η' mass. We will also discuss whether the U_A(1) breaking effect remains at high temperature.

28 ref

012146   Lavneet Kaur;Raj Kumari (Physics Dep, Panjab Univ, Chandigarh-160 014, Email: rajkumari80pu@gmail.com) : On the role of deformed coulomb potential in fusion using energy density formalism. Pramana J Phys 2015, 85(4), 639-51.

Using the Skyrme energy density formalism, the effect of deformed Coulomb potential on fusion barriers and fusion cross-sections is studied. Our detailed study reveals that the fusion barriers as well as fusion probabilities depend on the shape deformation (due to deformed Coulomb potential) of the colliding nuclei. However, this dependence due to deformed Coulomb potential is found to be very weak.

5 illus, 3 tables, 23 ref

012145   Kuiry D R (Mathematics Dep, Kolhan Univ, Chaibasa-833 202, Email: dr.kuiry10@yahoo.com) : MHD flow behaviour close to an oscillation of a porous-wall. Indian J Theor Phys 2014, 62(1-2), 9-18.

The unsteady two-dimensional flow behaviour of a solution of viscous, incompressible and electrically conducting fluid close to an oscillating infinite porous flat wall is investigated for the case of sunction under the influence of a uniform transverse magnetic field relative to the wall. The velocity curves for magnetohydrodynamic (abbreviated as MHD) flow in the vicinity of the porous-wall for various values of suction as well as magnetic parameter are neatly represented through the graphs. The results of the problem obtained have been well-interpreted and discussed.

1 illus, 9 ref