Journal of Nuclear Physics, Material Sciences, Radiation and Applications

Journal Information
ISSN / EISSN : 2321-8649 / 2321-9289
Current Publisher: Chitkara University Publications (10.15415)
Total articles ≅ 165
Archived in
SHERPA/ROMEO
Filter:

Latest articles in this journal

Sukadev Sahoo, M. Kumar
Journal of Nuclear Physics, Material Sciences, Radiation and Applications, Volume 8, pp 79-83; doi:10.15415/jnp.2020.81010

Abstract:
The effect of magnetic fields on the leptonic decay of charged B meson B− → l-v- is investigated. The decay rate of the process is calculated both in the absence and presence of magnetic field. The non-perturbative parameters fB± (B), f'B± and MB±(B) are also estimated.
Sardar Muhammad Shauddin
Journal of Nuclear Physics, Material Sciences, Radiation and Applications, Volume 8, pp 1-6; doi:10.15415/jnp.2020.81001

Abstract:
Due to cost effective and simplicity homogeneous reactors have been widely used for experimental and research purposes. Parameters which are difficult to get from a heterogeneous reactor system can be easily obtained from a homogeneous reactor system and can be applied in the heterogeneous reactor system if the major parametric differences are known. In this study, homogenization effects of VVER (Water Water Energetic Reactor)-1000 fuel assembly on neutronic parameters have been analyzed with the universal probabilistic code MCNP (Monte Carlo N-Particle). The infinite multiplication factor (k∞) has been calculated for the reconfigured heterogeneous and homogenous fuel assembly models with 2 w/o U-235 enriched fuel at room temperature. Effect of mixing soluble boron into the moderator/coolant (H2O) has been investigated for both models. Direct and fission detected thermal to higher energy neutron ratio also has been investigated. Relative power distributions of both models have been calculated at critical and supercritical states. Burnup calculations for both the reconfigured cores have been carried out up to 5 years of operation. Effective delayed neutron fraction (βeff) and prompt removal lifetime (ℓ) also have been evaluated. All the results show significant differences between the two systems except the average relative power.
H. C. Manjunatha, S. Alfred Cecil Raj, A. M. Nagaraja, N. Sowmya
Journal of Nuclear Physics, Material Sciences, Radiation and Applications, Volume 8, pp 55-63; doi:10.15415/jnp.2020.81007

Abstract:
Cluster radioactivity is an intermediate between alpha decay and spontaneous fission. It is also an exotic decay obtained in superheavy nuclei. When a cluster decay is detected in superheavy nuclei, the daughter nuclei is having near or equal to doubly magic nuclei. We have investigated cluster decay of isotopes of He, Li, Be, Ne, N, Mg, Si, P, S, Cl, Ar and Ca in the superhaevy nuclei region 299-306122. We have also compared the logarithmic half-lives of cluster decay with that of other models such as Univ [1], NRDX [2], UDL [3] and Horoi [4]. From this study it is concluded that cluster decay of 4He, 22Ne, 26Mg, 28Si 30Si, 34S, 40Ca and 46Ca are having shorter logarithmic half-lives compared to exotic cluster decay modes.
A.V.S. Satyanarayana Avupati, M. Jagannadha Rao M. Jagannadha Rao
Journal of Nuclear Physics, Material Sciences, Radiation and Applications, Volume 8, pp 33-42; doi:10.15415/jnp.2020.81005

Abstract:
In the chemical characterization of charnokite is well investigated by using PIXE and other analytical techniques, but PIXE not given information about some of elements completely, because every technique including PIXE has proper limitations. To obtain the complete geochemical explanation of matrix charnockite composition, the experimental factors behind missing elements in PIXE at 3 MeV techniques with comparison must known and hence are used for the analysis of matrix compositions related to the earth materials like charnockite. In this study, the results obtained from PIXE compared with other analytical techniques and experimental factors of PIXE are discussed. By investigating the geochemical nature of complex charnockite material, the experimental factors which are related to the missing elements in this study of wide range of elements obtained from PIXE spectrum through the previous analytical techniques have been discussed.
Amr Abdelhady
Journal of Nuclear Physics, Material Sciences, Radiation and Applications, Volume 8, pp 7-10; doi:10.15415/jnp.2020.81002

Abstract:
This study aims to evaluate the radiation dose rate distribution inside temporary spent fuel open-pool storage. The storage pool is connected to the main pool via transfer channel to facilitate transporting the spent fuel under water that avoiding radiation dose rising in the working area in the reactor. The storage pool was prepared to store 800 spent fuel elements that considering the maximum capacity of storage. The spent fuel elements in the storage pool have different decay times depending on the times of extraction from the core. Assuming conservatively, that the spent fuels of the 5-years decay time would be stored in the lower rack and the spent fuels, of decay time ranged between 10 days and 5 years, would be stored in the upper rack. The dose rate was profiled in the region above the upper rack using SCALE/MAVRIC code applying adjoint flux calculation as a variance reduction technique. The results show that the dose rate values in the region above the pool surface would be lower than the permissible limits.
V. P. Singh, Huseyin Ozan Tekin
Journal of Nuclear Physics, Material Sciences, Radiation and Applications, Volume 8, pp 73-79; doi:10.15415/jnp.2020.81009

Abstract:
Gamma-ray shielding parameter for some concretes and dosimeters having large scale applications in radiological protection are presented using MCNPX (version 2.4.0) at different energies. The MCNPX results are compared with experimental, MCNP and XCOM data, and good agreement is being noted. Present study indicates that MCNPX simulation method is suitable and reliable simulation tool to be used as an alternative method for the investigation of gamma-ray interaction. The present geometry can be used as standard geometry for MCNPX simulation for low- as well as high-Z materials.
K. Venkataramaniah, M. Sainath, K.Vijay Sai, Dwarakarani Rao, Deepa Seetharaman
Journal of Nuclear Physics, Material Sciences, Radiation and Applications, Volume 8, pp 25-31; doi:10.15415/jnp.2020.81004

Abstract:
Background: Conventional magnetic spectrometers used for conversion electron detection are very cumbersome, require strong magnetic fields and the spectra have to be scanned point by point and have very low transmission. A magnetic filter using permanent magnets and an Si(Li) detector would facilitate multichannel analysis with high transmission. The mini-orange is a new type of spectrometer for conversion electrons combining a solid state Si(Li) detector with a filter of permanent magnets around a central absorber of lead.Purpose: An indigenously developed magnetic spectrometer if optimized properly would be of great use in conversion electron spectroscopy for both online and offline experiments. Methods: A Mini-Orange magnetic spectrometer made of small permanent magnets has been designed and developed indigenously and optimized for its best performance condition. The transmission curves for different energy regions are plotted using the conversion electron spectra from the standard gamma transitions from 153Gd, 169Yb and 131Ba decays. The optimized spectrometer facilitates multichannel acquisition of conversion electron spectra for precision electron spectroscopy. The system also can be used in in-beam experiments with minor modifications of the vacuum chamber.Results: The optimized spectrometer was used for precision electron spectroscopy. Experimental transmission curves are then obtained by plotting Transmission (T) against the corresponding electron energy for low energy, medium energy and a broad energy range. Out of the several experiments done the optimum settings for f and g, that resulted in this curve, is identified at f = 7.5 cm and g = 4.5 cm. Conclusions: The optimized spectrometer facilitates multichannel acquisition of conversion electron spectra for precision electron spectroscopy. The system also can be used in in-beam experiments with minor modifications of the vacuum chamber.
D. N. Poenaru, R. A. Gherghescu
Journal of Nuclear Physics, Material Sciences, Radiation and Applications, Volume 8, pp 65-71; doi:10.15415/jnp.2020.81008

Abstract:
Cluster radioactivity (spontaneous emission of heavy particles from nuclei) is presented from theoretical point of view in good agreement with experimental results. After a brief hystorical account we give details about the analytical super asymmetric fission (ASAF) model extensively used for predicting the half-lives of heavy and superheavy (Z ≥ 104) elements. For the already measured 26 cluster decays (from 14C to 32,34Si of parent nuclides with Z = 87-96) it is clear that cluster radioactivity is a rare phenomenon in the best case about 9 orders of magnitude weaker than the competing alpha decay. Then we show the theoretical possibility of a strong cluster decay compared to alpha decay for some superheavy nuclei with Z ≥ 122, e.g. 306122; 310-314122; 306-324124, and 311-323124.
R.K. Biju, K. Prathapan, K.P. Anjali
Journal of Nuclear Physics, Material Sciences, Radiation and Applications, Volume 8, pp 11-24; doi:10.15415/jnp.2020.81003

Abstract:
The possibility for the existence of 1-neutron and 2-neutron halo nuclei through the decay of even-even nuclei 270-316116, 272-318118 and 278-320120 in the super-heavy region is studied within the frame work of the Coulomb and Proximity Potential Model (CPPM). Halo structure in neutron rich nuclei with Z
M.K. Preethi Rajan, R.K. Biju R.K. Biju, K.P. Santhosh K.P. Santhosh
Journal of Nuclear Physics, Material Sciences, Radiation and Applications, Volume 8, pp 43-53; doi:10.15415/jnp.2020.81006

Abstract:
In the present work we studied the β-decay of various isotopes in the heavy region using the empirical formula of Fiset and Nix. It is found from the half-life that as the neutron number increases the possibility of β-decay increases. From the dependence of beta decay half-life on neutron number of parent and Q-value, we modified empirical formula of Fiset and Nix for beta decay half-life. We also developed an empirical formula for the Z-value of most stable isobar against β-decay. From the study of mass parabola for different isobars with mass number ranging from 200-223 it was found that the lowest point in the parabola, which is the Z-value of most stable isobar against β-decay, matches well with our formula predictions.
Back to Top Top