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1. 中国原子能科学研究院,北京,102413
2. 深圳大学,深圳,518060
[ "通讯作者: 李志宏,E-mail: zhli@ciae.ac.cn E-mail:zhli@ciae.ac.cn" ]
纸质出版日期:2015-05-08
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甘 林, 李志宏, 李云居, 等. 94Zr中子谱因子的实验研究[J]. 核技术, 2015,38(5):050503
Experimental study of the neutron spectroscopic factor of 94Zr[J]. Nuclear techniques, 2015, 38(5): 050503
甘 林, 李志宏, 李云居, 等. 94Zr中子谱因子的实验研究[J]. 核技术, 2015,38(5):050503 DOI: 10.11889/j.0253-3219.2015.hjs.38.050503.
Experimental study of the neutron spectroscopic factor of 94Zr[J]. Nuclear techniques, 2015, 38(5): 050503 DOI: 10.11889/j.0253-3219.2015.hjs.38.050503.
94Zr的中子谱因子可用于研究93Zr(n
?)94Zr直接辐射俘获反应的激发函数和天体物理反应率,对研究s-过程的核合成有重要意义。现有的94Zr中子谱因子实验结果仍存在较大的差异。本工作在北京HI-13串列加速器Q3D磁谱仪上测量了12C+94Zr、13C+94Zr弹性散射反应及94Zr(12C
13C)93Zr单中子转移反应的角分布。通过对弹性散射角分布的仔细分析,拟合出了入射道和出射道的光学势参数,并结合扭曲波玻恩近似(Distorted wave Born approximation
DWBA)理论对转移反应的微分截面进行了理论分析,提取出94Zr的中子谱因子为2.60±0.20。
Background: The slow neutron capture (s-) process plays a very important role in the nucleosynthesis
which produces about half of the elements heavier than iron. 94Zr is mainly from 93Zr(n
?)94Zr in the s-process
and can be used to study the s-process. And the direct component of the 93Zr(n
?)94Zr capture reaction can be derived from the neutron spectroscopic factors of 94Zr. Purpose: As the existing neutron spectroscopic factors of 94Zr differ from each other up to 60%
a new work should be adopted to measure them exactly. Methods: In the present work
the angular distribution of 94Zr(13C
13C)94Zr
94Zr(12C
12C)94Zr and 94Zr(12C
13C)93Zr were obtained using the high-precision Q3D magnetic spectrograph. In addition
distorted-wave Born approximation (DWBA) calculations of the transfer differential cross sections were performed. Results: The calculated result was in good agreement with the experiment data
and a value of 2.60±0.20 for the neutron spectroscopic factor of 94Zr was extracted. Conclusion: With the neutron spectroscopic factor of 94Zr obtained in the work
the direct component of the 93Zr(n
?)94Zr reaction can be derived in the near future. Abstract
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