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Model calculation and analysis of 151Eu neutron capture cross section contributed by isomeric state of 152Eu
- NUCLEAR TECHNIQUES Vol. 41, Issue 11, Article number: 110503(2018)
- 作者机构：
1.中国科学院上海应用物理研究所 上海 201800
2.中国科学院大学 北京 100049
3.上海科技大学 上海 201210
4.中山大学 物理与天文学院 珠海 519082
5.上海大学 材料科学与工程学院 上海 200044
- 作者简介：
- 基金信息：National Natural Science Foundation of China;National Natural Science Fund for Creative Research Groups;Strategic Priority Research Program of Chinese Academy of Sciences
DOI：10.11889/j.0253-3219.2018.hjs.41.110503
CLC： O571.1Received：19 March 2018，
Revised：25 May 2018，
Published：10 November 2018
- 稿件说明：
移动端阅览
Han XUE, Yugang MA, Hongwei WANG, et al. Model calculation and analysis of 151Eu neutron capture cross section contributed by isomeric state of 152Eu[J]. Nuclear techniques, 2018, 41(11): 110503
Han XUE, Yugang MA, Hongwei WANG, et al. Model calculation and analysis of 151Eu neutron capture cross section contributed by isomeric state of 152Eu[J]. Nuclear techniques, 2018, 41(11): 110503 DOI： 10.11889/j.0253-3219.2018.hjs.41.110503.
摘要
151
Eu中子俘获截面在反应堆物理以及核天体物理慢中子俘获过程中具有重要的作用，由于
152
Eu两个同质异能态（m1，0-；m2，8-）的贡献，使得生成
152
Eu基态和同质异能态的中子俘获截面的测量和区分难度增大。利用核反应理论模型程序-TALYS-1.8，计算了中子能量在0.01~20 MeV区间的
151
Eu（n，γ）
152
Eu基态和同质异能态的中子俘获反应截面，并与EXFOR截面数据库中已有的实验数据进行比较，检验了现有
151
Eu实验数据的可靠性。分析表明：由于
152
Eu基态和第一同质异能态都存在121.8 keV能级的退激，使得它们的截面测量存在较大误差，而基态和第二同质异能态的截面理论值基本与实验值相一致。
Abstract
Background
2
The
151
Eu neutron capture cross-section plays an important role in reactor physics and in the slow neutron capture of nuclear astrophysics.
Purpose
2
This study aims to distinguish two isomers of
152
Eu and measure neutron capture cross-section of
151
Eu.
Methods
2
The
151
Eu(n
γ)
152
Eu reaction cross-sections at the neutron energies from 0.01 MeV to 20 MeV were calculated by using software TALYS-1.8 which is a mature computer code for simulating nuclear reactions in present work. The accuracy of simulation calculation program was verified and compared the theoretical data with the existing experimental data from EXFOR cross-section database and the latest neutron activation cross-section data.
Results & Conclusions
2
The results show that there is a large error in the cross-section measurement of the ground state and the first isomeric state due to the interference of the 121.78 keV energy level
whereas the theoretical values of the ground state and the second isomeric state are basically consistent with the existing experimental values.
关键词
Keywords
references
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