^(159)Tb中子辐射俘获反应截面的理论计算  

Theoretical Calculation of^(159)Tb Neutron Reaction Capture Reaction Cross Section

作　　者：杨雪 黄美容 张苏雅拉吐 王德鑫[1,2] 利国 YANG Xue;HUANG Meirong;ZHANG Suyalatu;WANG Dexin;LI Guo(College of Physics and Electronic Information,Inner Mongolia Minzu University,Tongliao 028043,China;Institute of Nuclear Physics,Inner Mongolia Minzu University,Tongliao 028043,China)

机构地区：[1]内蒙古民族大学物理与电子信息学院,内蒙古通辽028043 [2]内蒙古民族大学核物理研究所,内蒙古通辽028043

出　　处：《内蒙古民族大学学报（自然科学版）》2024年第6期59-63,共5页Journal of Inner Mongolia Minzu University：Natural Sciences Edition

基　　金：国家自然科学基金项目(12365018,U2032146);内蒙古自治区自然科学基金项目(2023MS01005)。

摘　　要：^(159)Tb中子俘获反应的研究对于核物理、核能应用及核天体物理领域具有重要意义,有助于深入理解重核的形成和演化过程以及提高相关核数据的精确性和可靠性。核数据库中,^(159)Tb(n,γ)^(160)Tb截面的评价数据少,且实验数据存在分歧。为了提高^(159)Tb中子俘获反应截面数据的准确性,进行了1 keV~10 MeV能量范围内的^(159)Tb(n,γ)^(160)Tb反应中子俘获截面的理论计算。利用TALYS-1.9程序,比较了不同能级密度模型下1 keV~1 MeV低能区的反应截面,发现ldmodel5模型与最近实验数据吻合度最高。同时,对ldmodel5下的平均辐射宽度参数进行了调整,结果表明,当Γγadjust设为0.9时,理论计算结果与实验数据最符合。通过选择合适的能级密度模型和参数调整,验证了TALYS在^(159)Tb(n,γ)^(160)Tb反应理论计算中的可靠性,计算得到的反应截面与大量实验数据吻合度良好。The study of the neutron capture reaction of^(159)Tb is of great significance in the fields of nuclear physics,nuclear energy applications,and nuclear astrophysics.It helps to deepen the understanding of the formation and evolution processes of heavy nuclei and improve the accuracy and reliability of relevant nuclear data.In the nuclear database,there is a lack of evaluation data for the^(159)Tb(n,γ)^(160)Tb cross section,and discrepancies exist in the experimental data.In order to improve the accuracy of the^(159)Tb neutron capture reaction cross section data,theoretical calculations of the^(159)Tb(n,γ)^(160)Tb reaction neutron capture cross sections in the energy range from 1 keV~10 MeV were performed.Using the TALYS-1.9 program,the reaction cross sections in the low energy region of 1 keV~1 MeV under different level density models were first compared,and it was found that the ldmodel5 model had the highest agreement with the most recent experimental data.At the same time,the average radiation width parameter under ldmodel5 was adjusted,and the results showed that whenΓγadjust was set to 0.9,the theoretical calculation results were most consistent with the experimental data.By selecting an appropriate level density model and parameter adjustment,the reliability of TALYS in the theoretical calculation of the^(159)Tb(n,γ)^(160)Tb reaction was verified,and the calculated reaction cross section showed good agreement with a large amount of experimental data.

关 键 词：^(159)Tb(n γ)^(160)Tb反应 反应截面 TALYS-1.9 

分 类 号：O571.42[理学—粒子物理与原子核物理]