scholarly journals A Comparison Between the Theoretical Cross Section Based on the Partial Level Density Formulae Calculated by the Exciton Model with the Experimental Data for (_79^197)Au nucleus

2021 ◽  
Vol 18 (1) ◽  
pp. 0139
Author(s):  
Athraa Abdullah ◽  
Ali D Salloum
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Level Density ◽  
Experimental Cross Section ◽  
Theoretical Cross Section ◽  
Exciton Model ◽  
Experimental Cross ◽  
Two Component ◽  
The One ◽  
Acceptable Agreement

In this paper, the theoretical cross section in pre-equilibrium nuclear reaction has been studied for the reaction  at energy 22.4 MeV. Ericson’s formula of partial level density PLD and their corrections (William’s correction and spin correction) have been substituted  in the theoretical cross section and compared with the experimental data for  nucleus. It has been found that the theoretical cross section with one-component PLD from Ericson’s formula when  doesn’t agree with the experimental value and when . There is little agreement only at the high value of energy range with  the experimental cross section. The theoretical cross section that depends on the one-component William's formula and on-component corrected to spin PLD formula doesn't agree with the experimental cross section. But in case of theoretical cross section based on two-component Ericson's and William's PLD formulae it has been found that there is acceptable agreement when the exciton number is taken .  

An investigation of effects of level density models and gamma ray strength functions on cross-section calculations for the production of 90Y, 153Sm, 169Er, 177Lu and 186Re therapeutic radioisotopes via (n,γ) reactions

2019 ◽  
Vol 108 (1) ◽  
pp. 11-17
Author(s):  
Mert Şekerci ◽  
Hasan Özdoğan ◽  
Abdullah Kaplan
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Production Cross Section ◽  
Gamma Ray ◽  
Production Cross ◽  
Level Density ◽  
Experimental Studies ◽  
Level Density Models ◽  
Strength Functions ◽  
Cancer Diseases

Abstract One of the methods used to treat different cancer diseases is the employment of therapeutic radioisotopes. Therefore, many clinical, theoretical and experimental studies are being carried out on those radioisotopes. In this study, the effects of level density models and gamma ray strength functions on the theoretical production cross-section calculations for the therapeutic radioisotopes 90Y, 153Sm, 169Er, 177Lu and 186Re in the (n,γ) route have been investigated. TALYS 1.9 code has been used by employing different level density models and gamma ray strength functions. The theoretically obtained data were compared with the experimental data taken from the literature. The results are presented graphically for better interpretation.

COMPOUND NUCLEUS FORMATION IN NITROGEN–OXYGEN AND OXYGEN–OXYGEN REACTIONS

1962 ◽  
Vol 40 (1) ◽  
pp. 139-149
Author(s):  
W. A. Cartledge
Keyword(s):  
Cross Section ◽  
Compound Nucleus ◽  
Center Of Mass ◽  
Branching Ratio ◽  
Nuclear Interaction ◽  
Experimental Cross Section ◽  
Interaction Radius ◽  
Nucleus Formation ◽  
Experimental Cross ◽  
Compound Nucleus Formation

The experimental cross section for the reaction O16(N14,2p)Al28 is compared with the predictions of the square-well model of compound nucleus formation over the range 6.3 to 12 Mev (center of mass energy). The branching ratio is estimated from the experimental cross section for the comparison reaction Si29(p,2p)Al28 over the same range of excitation in the compound nucleus P30*. It is found that the branching ratio probably increases from about 10% to 20%, which requires the nuclear interaction radius for N14 + O16 to decrease from about 8.5 to 7.5 fermis as the energy is increased over this range.Because of the similarity in mass and observed charge distributions in N14 and O16, the interaction radius for compound nucleus formation in a collision between two oxygen nuclei is probably also similar and in the range 8.0 to 9.1 fermis at energies far below the Coulomb barrier. A consequence of this result is that oxygen ions, which may be present in the cores of sufficiently developed red giant stars, will be destroyed by O16 + O16 collisions in about 105 years and 1 year respectively, at temperatures in the vicinity of 13.0 and 18.5 × 108 °K.

Experimental cross section for the 152Sm(n, γ)153Sm reaction at 0.0334 eV

2014 ◽  
Vol 102 (7) ◽  
Author(s):  
Md. Shuza Uddin ◽  
Nazmin Afroze ◽  
Tapash Kumar Datta ◽  
Syed Mohammod Hossain ◽  
A. K. M. Zakaria ◽  
...  
Keyword(s):  
Cross Section ◽  
Neutron Capture ◽  
Capture Cross Section ◽  
Experimental Cross Section ◽  
Capture Cross ◽  
Neutron Capture Cross Section ◽  
Experimental Cross

AbstractThe neutron capture cross section for the

scholarly journals Kriging approach for the experimental cross-section covariances estimation

2013 ◽  
Vol 42 ◽  
pp. 07003
Author(s):  
S. Varet ◽  
P. Dossantos-Uzarralde ◽  
N. Vayatis ◽  
A. Garlaud ◽  
E. Bauge
Keyword(s):  
Cross Section ◽  
Experimental Cross Section ◽  
Experimental Cross ◽  
Kriging Approach

Experimental Cross Section for Photodetachment of Electrons fromH−andD−

1955 ◽  
Vol 98 (4) ◽  
pp. 1028-1034 ◽  
Author(s):  
Lewis M. Branscomb ◽  
Stephen J. Smith
Keyword(s):  
Cross Section ◽  
Experimental Cross Section ◽  
Experimental Cross

Level Density of the Pre Compound Nucleus Calculations for [28 60Ni], [28 58Ni], Using Exciton Model

2021 ◽  
Vol 900 ◽  
pp. 34-41
Author(s):  
Maha Taha Idrees
Keyword(s):  
Energy Dependence ◽  
Compound Nucleus ◽  
Level Density ◽  
Major Effect ◽  
State Density ◽  
Hole State ◽  
Two Component System ◽  
Exciton Model ◽  
Component System ◽  
Two Component

The level density for the pre compound [28 60Ni],[2858Ni], at certain exciton number, are calculated for one &two component system based on Ericson's formula. The Pauli, Slight and Pairing correction are examined with the behavior of the level density for one & two components. The particle – hole state density has been calculated by means of the energy dependence of excited number in [28 60Ni], [2858Ni]. The present results are compared between one &two component with Pauli, Slight and Pairing correction. The Pairing correction has a major effect in the present calculations. Keyword: level density, Exciton model, [28 60Ni],[2858Ni], , Formula ESM.

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