Journal of Nuclear Physics, Material Sciences, Radiation and Applications
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Calculating the energy of electron in H-atom using modified SUSY physics
Get PDFIn this paper considering the authors previously proposed SUSy concept - ‘fermion and boson mass ratio is close to 2.26’ and considering the electroweak neutral boson, an attempt is made to understand the total energy of revolving electron in the hydrogen atom. thus in this paper authors succeeded in extending the basic applications of SUSY and electroweak theory to atomic level. With further research and analysis, the hidden secrets of electroweak unification can be understood very easily
Dark Matter and Experiments for its Identification
Get PDFAfter Fritz Zwicky, through various theoretical models, several dark matter events have been proposed. but none of them is yet discovered. Recent experiment shows that only around 5% of the total matters present in the whole universe are visual. Rest matter is still unknown to us by any present experimental tools. this leads that detection of dark matter is one of the very challenging & curios goal for experimental physicists. For the search of suitable dark matter candidates and for rear physics events, high Purity germanium detectors, Spherical gaseous chamber detector and few more hybrid-detectors are suitable for these purposes. We proposed that any suitable detector hosted under deep sea water will be more effective than the under ground or mountain caverns
Beam Behaviour and Magnetic Field of K500 SCC
Get PDFThe extraction of the beam from the k500 Superconducting Cyclotron in kolkata is posing a great challenge. After getting the internal beam, lots of effort were made to extract the beam and thereafter various experiments were designed and done to know the beam behaviour and to investigate the real reason. the deflector electrode was used in the Faraday cup mode. the deflector probe, bore scope probe and the main probe were used to investigate the beam behaviour by varying the first harmonic amplitude and phase with the help of trim-coil no.13 by operating it in harmonic mode. Finally magnetic field mapping was done. In this paper, all these experimental results are described in detail
Structural Stability and Level Density of Hot Rotating Doubly Magic Isotopes of Calcium
Get PDFThe recently reported doubly-magic nuclei 52Ca and 54Ca are discussed in comparison with the other magic isotopes of Calcium. the temperature effect is included in this study and hence the statistical approach to obtain the particle emission and level density are discussed in the context of temperature effect. We predict an increase in neutron emission for 54Ca due to the abrupt decrease in neutron separation energy around t=0.4MeV. Since the drop in the separation energy is closely associated with the structural changes in the rotating nuclei, relative increase in neutron emission probability around certain values of temperature may be construed as evidence for the shape transition. Such effects are not obtained for 40,48,52Ca isotopes. hence this statistical study reveals the higher stability of magic nature of 52Ca than 54Ca, against temperature
Status of Θ13
Get PDFThe Neutrino mixing angle θ13 is at the focus of current neutrino research. Till 2010 the value of θ13 was assumed to be zero. Thanks to a number of consistent experimental efforts now we have a definitive value of θ13. Its measured value is sin22θ13≈ 0.1. This has promising implications for the determination of the two remaining unknown parameters, sign of the ∆m231 and CP violating phase δCP from the present and proposed accelerator neutrino experiments in the foreseeable future
Nucleosynthesis in Neutron Stars Crust
Get PDFWe address the problem of the origin of heavier and super heavy elements in nature. Believing rapid neutron capture process (r-process) is responsible for synthesis of heavy and super heavy elements in the remnants of supernovae explosions and neutron star crusts under extreme conditions, we developed a computer code in order to understand the formation of elements in extreme astrophysical systems. We carried out Nuclear Statistical equilibrium (NSE) as well as static r-process calculations for a wide range of input parameters
Critical Exponents of Quantum Phase Transition Between U(5) and O(6) Limits of Interacting Boson Model
Get PDFIn this paper, Landau theory for phase transitions is shown to be a useful approach for quantal system such as atomic nucleus. A detailed analysis of critical exponents of ground state quantum phase transition between U(5) and O(6) limits of interacting boson model is presented. Our results suggest a similarity between these two frameworks and a second order phase transition between these limits based on a discontinuity in the heat capacity
Nuclei Near and Far From β-Stability Line
Get PDFProton to neutron ratio around β-stability line presents an open challenge to the nuclear physicists. The prominent milestone in this regard is the discovery of the super heavy elements, nuclear halos in the lightest neutron-rich nuclei, experimental mapping of the nuclear shell structure near and far from stability. In this present paper, the behavior of the p- and n- halo nuclei near the β-stability line are discussed considering the variation of radius with respect to the mass number and N~Z for different nuclei. Our aim is to study the nuclear properties through neutron and proton skin. The isospin symmetry breaking is for heavy halo nuclei of strong interest
Study of Excitation Functions of (p, n) Reactions for 56Fe and 57Fe Target from Threshold to 30 MeV
Get PDFThe theoretical calculation of the cross section for formation of 56,57co in (p, n) reaction from 56,57Fe target have been studied from reaction threshold to 30 MeV using TALyS-1.4 nuclear model reaction code whereby we have studied major nuclear reaction mechanisms, including direct, pre-equilibrium and compound nuclear reactions. These calculations were carried out by adjusting the effective imaginary potential, level density and shell damping parameters. It is observed that an excellent agreement between the theoretical calculated and experimental data is obtained with minimal effort on parameter fitting. we have also observed that there is significant contribution of pre-equilibrium emission in (p, n) reaction cross-section of 56Fe and 57Fe. The systematic increase in (p, n) cross-sections with increasing neutron number in reactions induced by protons on 56Fe and 57Fe is explained in terms of compound and pre-equilibrium mode
Detector Geometry Simulation Using GEANT4
Get PDFNeutrino oscillation is an important phenomenon to explain the massive nature of neutrinos. this quantum mechanical phenomenon can be understood as mixing in quark sector just like the one we have in lepton sector. Observed deficit of solar neutrino flux is explained through neutrino oscillations and this study is the only way to investigate for small difference of neutrino masses thus gives signatures for the physics beyond Standard Model. Experimental results by Superkamiokande put a huge interest of experimentalists in neutrino field. In the present article after discussing the theoretical background of neutrinos and their status in standard model, latest important long baseline neutrino oscillations experiments as NOvA and lBNE has been discussed. Straw tube Detector, an important part of lBNE-near detector, has been reviewed the geometry of which is studied through a software geometry and tracking (geant4). using geant4, an important aspect of detector geometry and simulation has been studied