PrnγPr反应截面的测量THECROSSSECTION.PDF

CNIC-01483 PU-0009 141Pr(n, γγ) 142Pr 反应截面的测量 γγ THE CROSS SECTION MEASUREMENTS FOR 141Pr(n, γγ) 142Pr REACTION γγ (In Chinese) 中 国 核 情 报 中 心 China Nuclear Information Centre CNIC-01483 PU-0009 141Pr(n, γ)142Pr 反应截面的测量* 袁之伦 陈金象 唐国有 施兆民 (北京大学重离子物理研究所，北京， 100871) 卢涵林 ( 中国原子能科学研究院，北京，102413) 摘 要 用活化法测量了中子能量在0.539 MeV ，1.090 MeV 和1.587 MeV 的141Pr(n, γ)142Pr 核反应截面值，γ 放射性活度用高纯锗探测 器测量，实验的测量误差在±(6～7)%范围内。实验结果与其它各 家的实验值进行了比较和分析，给出了推荐的激发曲线。 * 北京大学重离子物理教育部重点实验室开放课题资助。 1 The Cross Section Measurements for 141Pr(n, γγ)142Pr Reaction* γγ (In Chinese) YUAN Zhilun CHEN Jinxiang TANG Guoyou SHI Zhaomin (Institute of Heavy Ion Physics, Peking University, Beijing, 100871) LU Hanlin (China Institute of Atomic Energy, Beijing, 102413) ABSTRACT The neutron cross sections for 141Pr(n, γ)142Pr reaction relative to the 197Au(n, γ)198Au reaction are measured at neutron energies of 0.539 MeV, 1.090 MeV and 1.587 MeV by using the activation method. The activities of the products are measured with a high resolution HPGe detector gamma-ray spectrometer. The errors of the present work are in the range of ±6%～±7%. The results are compared with those of other authors and the recommanded excited curve