Giant dipole resonance parameters optimization and photo-neutron cross-section calculations of several spherical and deformed nuclei

IF 1.6 3区工程技术 Q3 CHEMISTRY, INORGANIC & NUCLEAR Applied Radiation and Isotopes Pub Date : 2024-08-20 DOI:10.1016/j.apradiso.2024.111477

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Abstract

Understanding the interaction between photons and matter is crucial for exploring essential questions in nuclear physics. The Giant Dipole Resonance (GDR) is the prevailing mechanism in photo-absorption cross-sections up to 30 MeV. Depending on whether the nucleus is spherical or deformed, the curve of the photo-absorption cross-section versus photon energy is characterized by one or several Lorentzian peaks. Theoretical calculations of photo-absorption cross-sections are largely centered on deducing GDR parameters. These parameters are used in theoretical reaction codes that aim to simulate photon-induced nuclear reactions accurately. In this study, the GDR parameters for the spherical isotopes ¹¹⁵In, ¹⁴⁴Sm, ¹⁴⁸Sm, ¹⁵⁰Sm, and for the deformed isotopes ¹⁵⁴Sm, ¹⁵³Eu, and ¹⁶⁰Gd were calculated by optimizing to the experimental data. The calculated GDR parameters were inputted into the TALYS 1.8 code to compute the photo-neutron cross sections, which were then compared with experimental results from the literature. It has been observed that the calculations performed with the obtained GDR parameters are consistent with the experimental data.

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几种球形和变形核的巨偶极子共振参数优化和光中子截面计算。

了解光子与物质之间的相互作用对于探索核物理的基本问题至关重要。巨偶极子共振（GDR）是 30 MeV 以下光吸收截面的主要机制。根据原子核是球形还是变形，光吸收截面与光子能量的关系曲线会出现一个或多个洛伦兹峰。光吸收截面的理论计算主要集中在推导 GDR 参数上。这些参数被用于旨在精确模拟光子诱导核反应的理论反应代码中。在本研究中，通过对实验数据进行优化，计算了球形同位素 115In、144Sm、148Sm、150Sm 以及变形同位素 154Sm、153Eu 和 160Gd 的 GDR 参数。将计算出的 GDR 参数输入 TALYS 1.8 代码以计算光中子截面，然后与文献中的实验结果进行比较。结果表明，利用所获得的 GDR 参数进行的计算与实验数据一致。

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来源期刊

Applied Radiation and Isotopes 工程技术-核科学技术

CiteScore

3.00

自引率

12.50%

发文量

406

审稿时长

13.5 months

期刊介绍： Applied Radiation and Isotopes provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and peaceful application of nuclear, radiation and radionuclide techniques in chemistry, physics, biochemistry, biology, medicine, security, engineering and in the earth, planetary and environmental sciences, all including dosimetry. Nuclear techniques are defined in the broadest sense and both experimental and theoretical papers are welcome. They include the development and use of α- and β-particles, X-rays and γ-rays, neutrons and other nuclear particles and radiations from all sources, including radionuclides, synchrotron sources, cyclotrons and reactors and from the natural environment. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. Papers dealing with radiation processing, i.e., where radiation is used to bring about a biological, chemical or physical change in a material, should be directed to our sister journal Radiation Physics and Chemistry.