A formula used to subtract the effect of gamma-ray of the others to that of measured reaction in measurement of cross section of nuclear reaction and its application

• Published in: Chinese physics C Vol. 32; no. 11; pp. 873 - 876
• Main Author: 周丰群 杨兴强 王伟锋 李勇 张芳 拓飞 孔祥忠
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.11.2008; Electric and Information Engineering College,Pingdingshan University,Pingdingshan 467000,China%Physics & Electronic Engineering College,Nanyang Normal University,Nanyang 473061,China%School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China
• Subjects: HPGe探测器; 中子相互作用; 激活交叉断面; tellurium; formula; neutron-induced reactions; HPGe detector; activation cross sections
• ISSN: 1674-1137; 0254-3052; 2058-6132
• DOI: 10.1088/1674-1137/32/11/005

According to the regulation of growing and decay of artificial radioactive nuclide, a formula used to subtract the effect of characteristic γ-ray of the others to that of measured reaction was deduced. And then the cross sections of ^120Te （n, 2n）^119mTe reaction induced by neutrons around 14 MeV were measured by activation relative to the ^93Nb （n, 2n）^92mNb. In the process of the cross sections measured to be calculated, it was subtracted that the effect of characteristic γ-ray of ^126Te （n, p）^126Sb to that of measured ^120Te （n, 2n）^119mTe reaction using the formula deduced. The experimental results were （689±37） and （750±41） mb at the neutron energies of （13.5±0.3） and （14.6±0.3） MeV, respectively. Measurements were carried out by T-detection using a coaxial HPGe detector. As samples, spectroscopically pure tellurium powder has been used. The fast neutrons were produced by the T（d, n）4He reaction. The neutron energies in these measurements were determined by the method of cross-section ratios between ^90Zr （n, 2n） ^89m＋gZr and ^93Nb （n, 2n） ^92mNb reactions.