Activation cross-sections for the Re-185(n, 2n) reaction and the isomeric cross-section ratio of Re-184m,Re-g in the neutron energy range of 13-15 MeV
Activation cross-sections for the Re-185(n, 2n) reaction and the isomeric cross-section ratio of Re-184m,Re-g in the neutron energy range of 13-15 MeV
复制标题
中子能量13-15 MeV范围内Re-185(n, 2n)反应的活化截面以及Re-184m、Re-g的异构体截面比
DOI：
10.1140/epja/i2019-12698-1
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发表时间：
2019
影响因子：
2.7
通讯作者：
Jiang Li
中科院分区：
文献类型：
--
作者：
Luo Junhua;Jiang Li
在13-15 MeV能量范围内，测量了185 Re（n，2n）184 mRe和185 Re（n，2n）184 gRe反应的截面及其同分异构比。中子活化技术是在中国工程物理研究院（CAEP）的K-400中子发生器上应用的。天然Re样品和Nb监测箔被联合激活，以确定反应截面和入射中子通量。采用3 H（d，n）4 He反应产生中子束。利用剩余核衰变分析，从亚稳态的绝对截面导出基态的纯截面。用基于核模型的计算机程序TINGS-1.8，采用六个能级密度模型进行了数值计算，得到了~（185）Re（n，2n）~（184）m，gRe反应的激发函数及其同分异构截面比。最后，实验确定的横截面与相应的文献数据进行了比较。
Cross-sections and their isomeric ratios () for the185Re(n, 2n)184mRe and185Re(n, 2n)184gRe reactions in the 13–15 MeV range were measured. The neutron activation technique was applied using the K-400 neutron generator at the Chinese Academy of Engineering Physics (CAEP). Natural Re samples and Nb monitor foils were activated jointly to determine the reaction cross-section and the incident neutron flux. The3H(d, n)4He reaction was used to generate the neutron beam. The pure cross-section of the ground state was derived from the absolute cross-section of the metastable state using residual nuclear decay analysis. Numerical calculations using the nuclear-model-based computer code TALYS-1.8 with six level density models were used to obtain185Re(n, 2n)184m, gRe reaction excitation functions and their isomeric cross-section ratios. Finally, experimentally determined cross-sections were compared with corresponding literature data.