Surface wear studies in some materials using α-induced reactions

The radio-activity produced during the irradiation of ^63,65Cu, ⁵⁹Co, ⁹³ Nb and ^121,123 Sb targets with -particles have been measured using activation technique. The yields of radioactive isotopic products ^66,67,68Ga, ⁶¹ Cu, ⁹⁶g,m Tc and^123,124,126 I have been determined in the energy range ≈ 10-40 MeV using stacked foil technique. Radioactive counting of amples was performed with a high-resolution gamma-spectrometer. As light ion beams produce an extremely narrow layer of activities in the surface of a material, these reactions may be useful for thin layer activation study. 

Keywords:- activation technique, excitation functions, alpha inducedreactions, thin layer activation analysis. 

Authors:- Devendra P. Singh, Vijay R. Sharma, Abhishek Yadav, Unnati, B. P. Singh, R. Prasad

Department of Physics, Aligarh Muslim University, Aligarh, India
Thane, Maharashtra, India.
Pushpendra P.Singh
GSI, Helmholtz centre for Heavy Ion Research, GmbH, D-64291, Darmstadt, Germany
M. K. Sharma 
Department of Physics, S. V. College, Aligarh, India
H. D. Bhardwaj
Department of Physics, D. S. N. College, Unnao, India

Prospects of Dark Matter Direct Search under Deep Sea Water in India

There is compelling evidence from cosmological and astrophysical observations that about one quarter of the energy density of the universe can be attributed to cold dark matter (CDM), whose nature and properties are still unknown. Around the world large numbers of experiments are using different techniques of dark matter direct and indirect detections. According to their experimental requirements location of the experiment prefer to use either underground, under ice, or under sea water. Country like India, digging underground cavern and long tunnel is not very convenient. Therefore, authors look from the either solutions of this problem preferring to use deep sea water. In this article, we discuss the pros and corns of use of deep sea water in the dark matter search. 

Keywords:- Dark matter, elastic scattering, detection, sea water shielding 

Authors:- V. Singh, V. S. Subrahmanyam, L. Singh, M. K. Singh, V. Sharma, N. S. Chouhan, M. K. Jaiswal and A. K. Soma 

Physics Department, Banaras Hindu University, Varanasi 221 005, India

Cluster radioactivity in 127I

Using the preformation cluster model of Gupta and collaborators we have studied all the possible cluster decay modes of ¹²⁷ I. The calculated half-lives are compared with recently measured lower limits of cluster decay half-lives (for the clusters like ²⁴ Ne, ²⁸ Mg, ³⁰ Mg, ³² Si, ³⁴ Si, ⁴⁸ Ca and ⁴⁹Sc) of ¹²⁷I. Our calculated half-life values lies well above the experimentally measured lower limits and the trend of the values also matches with experimental ones. 

Keywords: Cluster radioactivity, half-life, Fission. 
Authors:- M. Balasubramaniam

Department of Physics, Bharathiar University, Coimbatore - 641046, India.
K. Manimaran
Department of Science and Humanities, Theni Kammavar Sangam College of Technology, Theni - 625534

Fission dynamics: the quest of a temperature dependent nuclear viscosity

This paper presents a journey within some open questions about the current use of a temperature dependent nuclear viscosity in models of nuclear ission and proposes an alternative experimental approach by using systems of intermediate fissility. This study is particularly relevant because: i) systems of intermediate fissility offer a suitable frame-work since the intervals between the compound nucleus and scission point temperatures with increasing excitation energy are much smaller than in the case of heavier systems, ii) the dependence of viscosity on the temperature may change with the fissility of the composite system; iii) the opportunity to measure also observables in the evaporation residues channel translates into a larger set of effective constraints for the models. 

Keywords:- fission dynamics; nuclear viscosity; dynamical models; intermediate fissility systems; charged particle multiplicities 

Authors:- E. Vardaci, A. Brondi, G. La Rana, R. Moro

Istituto Nazionale di Fisica Nucleare and Diparimento di Fisica, Universit ´a degli Studi di Napoli "FedericoII",Napoli, 80126, Italy
A. Di Nitto
Johannes Gutenberg- Universit ¨at Mainz Institut f ¨ur Kernchemie, Mainz, Germany
P.N. Nadtochy
Omsk State University, Mira prospekt 55-A, Omsk 644077, Russia
M. Cinausero, G.Prete 
Laboratori Nazionali di Legnaro dell’Istituto Nazionale di Fisica Nucleare, Legnaro (Padova), 35020, Italy
N. Gelli 

Volume 1, Number - 2 (February - 2014)

1. Extensions of Natural Radioactivity to 4th-Type and of the Periodic Table to Super-heavy Nuclei: Contribution of Raj K Gupta to Cold Nuclear Phenomena 
   by BirBikram Singh, Sushil Kumar, Manoj K. Sharma and S. K. Patra


2. Probable Projectile-Target Combinations for the Synthesis of Super Heavy Nucleus ²⁸⁶112 
   by K. P. Santhosh and V. Bobby Jose


3. On the Fusion of Neutron/ Proton-Rich Colliding Nuclei Using Isospin-Dependent Potentials
   by Ishwar Dutt and Maninder Kaur


4. Fission in Rapidly Rotating Nuclei
   by A. K. Rhine Kumar and Vinay Suram


5. Level Statistics of SU(3)↔SU(3) Transitional Region
   by H. Sabri, P. Hossein Nezhade Gavifekr, Z. Ranjbar, N. Fouladi, M. A. Jafarizadeh


6. An Approach to the Vertical Alignment in Nematic Liquid Crystals Via Spherical Silica Nanoparticles Self Assembly 
   by Pankaj Kumar, and Shin-Woong Kang


7. Characterization of Zinc Nanoferrite Doped HPMC Polymers Using X-Ray Diffraction 
   by Mahadevaiah, Thejas Urs G, T Demappa and R Somashekar


8. Synthesis and Crystallization Studies of Thermo-plastic Polyster/Titania Nanocomposites
   by Harshita Agrawal, Shalini Agarwal, Yogendra K. Saraswat, Kamlendra Awasthi and Vibhav K. Saraswat


9. Potential of Some Fungal and Bacterial Species in Bioremediation of Heavy Metals
   by Raman Kumar, Prem singh, Bhupinder Dhir,Anil K Sharma and Devinder Mehta


10. Elemental Analysis of Soil Samples Using Thick Target-Particle Induced X-Ray Emission (Tt-Pixe) Technique
    by Sunil Kumar and D. Mehta


11. Energy Dependence of Parameters Characterizing Multiply Backscattering of Gamma Photons
    by Arvind D Sabharwa, Bhajan Singh & B.S. Sandhu