scholarly journals Nuclear Level Density Parameters ofPb203-209andBi206-210Deformed Target Isotopes Used on Accelerator-Driven Systems in Collective Excitation Modes

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Şeref Okuducu ◽  
Nisa N. Aktı ◽  
Sabahattin Akbaş ◽  
M. Orhan Kansu
Keyword(s):  
Collective Excitation ◽  
Level Density ◽  
Neutron Resonance ◽  
Nuclear Level Density ◽  
S Wave ◽  
Nuclear Level ◽  
Driven Systems ◽  
Resonance Data ◽  
Accelerator Driven Systems ◽  
Good Agreement

The nuclear level density parameters of some deformed isotopes of target nuclei (Pb, Bi) used on the accelerator-driven subcritical systems (ADSs) have been calculated taking into consideration different collective excitation modes of observed nuclear spectra near the neutron binding energy. The method used in the present work assumes equidistant spacing of the collective coupled state bands of the considered isotopes. The present calculated results for different collective excitation bands have been compared with the compiled values from the literature for s-wave neutron resonance data, and good agreement was found.

CALCULATION OF NUCLEAR LEVEL DENSITY PARAMETERS OF SOME LIGHT DEFORMED MEDICAL RADIONUCLIDES USING COLLECTIVE EXCITATION MODES OF OBSERVED NUCLEAR SPECTRA

2009 ◽  
Vol 24 (33) ◽  
pp. 2681-2691 ◽  
Author(s):  
Ş. OKUDUCU ◽  
N. N. AKTI ◽  
H. SARAÇ ◽  
M. H. BÖLÜKDEMIR ◽  
E. TEL
Keyword(s):  
Nuclear Energy ◽  
Collective Excitation ◽  
Level Density ◽  
Neutron Resonance ◽  
Nuclear Level Density ◽  
S Wave ◽  
Neutron Binding Energy ◽  
Nuclear Level ◽  
Resonance Data ◽  
Medical Radionuclides

In this study the nuclear energy level density based on nuclear collective excitation mechanism has been identified in terms of the low-lying collective level bands near the neutron binding energy. Nuclear level density parameters of some light deformed medical radionuclides used widely in medical applications have been calculated by using different collective excitation modes of observed nuclear spectra. The calculated parameters have been used successfully in estimation of the neutron-capture cross section basic data for the production of new medical radionuclides. The investigated radionuclides have been considered in the region of mass number 40<A<100. The method used in the present work assumes equidistance spacing of the collective coupled state bands of the interest radionuclides. The present calculated results have been compared with the compiled values from the literatures for s-wave neutron resonance data.

Back shifted Fermi gas model with temperature dependent pairing energy: Thermal properties of 98Mo

2016 ◽  
Vol 25 (09) ◽  
pp. 1650065
Author(s):  
S. A. Alavi ◽  
V. Dehghani
Keyword(s):  
Experimental Data ◽  
Heat Capacity ◽  
Level Density ◽  
Fermi Gas ◽  
Nuclear Level Density ◽  
Temperature Dependent ◽  
Nuclear Level ◽  
Ginzburg Landau ◽  
The Mean ◽  
Good Agreement

The effect of using a temperature dependent pairing term in back-shifted Fermi-gas (BSFG) formula of nuclear level density has been studied. We have used the mean order parameter formula of modified Ginzburg–Landau (MGL) theory as a simple possible choice for temperature dependency of the pairing term. The level density and heat capacity of [Formula: see text]Mo have been calculated with this formalism and compared with the experimental data. We observed good agreement between the heat capacity of this model and the experimental data.

scholarly journals The effect of deformation parameter of heavy nuclei on level density parameter

2019 ◽  
Vol 12 (25) ◽  
pp. 38-43
Author(s):  
Mahdi Hadi Jasim
Keyword(s):  
Cross Sections ◽  
Collective Motion ◽  
Level Density ◽  
Reaction Cross ◽  
Neutron Resonance ◽  
Density Parameter ◽  
Heavy Nuclei ◽  
Nuclear Level Density ◽  
S Wave ◽  
Level Density Parameter

The possible effect of the collective motion in heavy nuclei has been investigated in the framework of Nilson model. This effect has been searched realistically by calculating the level density, which plays a significant role in the description of the reaction cross sections in the statistical nuclear theory. The nuclear level density parameter for some deformed radioisotopes of (even- even) target nuclei (Dy, W and Os) is calculated, by taking into consideration the collective motion for excitation modes for the observed nuclear spectra near the neutron binding energy. The method employed in the present work assumes equidistant spacing of the collective coupled state bands of the considered isotopes. The present calculated results for first excited rotational band have been compared with the accumulated values from the literature for s-wave neutron resonance data, and were in good agreement with those data.

scholarly journals Puzzle of collective enhancement in the nuclear level density

2021 ◽  
pp. 136173
Author(s):  
Deepak Pandit ◽  
Balaram Dey ◽  
Srijit Bhattacharya ◽  
T.K. Rana ◽  
Debasish Mondal ◽  
...  
Keyword(s):  
Level Density ◽  
Nuclear Level Density ◽  
Nuclear Level
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