122~125Sn中子谱因子的实验研究

多个Sn同位素位于慢速中子俘获（s-）过程路径上，其中子谱因子可用于计算ASn（n，γ） A+1Sn直接辐射俘获的天体物理反应率，并可研究Sn同位素对s-过程核合成的贡献。本工作在中国原子能科学研究院HI-13串列加速器Q3D磁谱仪上，对实验室系下8°~66°范围内的122，124Sn（d，p）和（p，d）单中子转移反应角分布进行了测量。利用DWBA理论计算了转移反应角分布，并提取了122-125Sn的基态以及123，125Sn第一激发态的中子谱因子。其中，122Sn和124Sn的基态中子谱因子是首次从实验上获得。由于本工作成功鉴别开了123，125Sn的基态和第一激发态的效应，因此给出的谱因子比前人的结果更可信。Several Tin isotopes are on the path of slow neutron capture (s-) process, and the direct components of (n, γ) reactions can be derived from their neutron spectroscopic factors. In the present work, the angular distributions of 122,124Sn(p, d) and (d, p) reactions are obtained using the high-precision Q3D magnetic spectrograph in Beijing HI-13 tandem accelerator in China Institute of Atomic Energy. The distorted-wave Born approximation (DWBA) calculations are performed to extract the neutron spectroscopic factors of the ground state of 122-125Sn and the first excited state of 123,125Sn. The neutron spectroscopic factors of the ground state of 122Sn and 124Sn are firstly obtained in this work. As the events of the ground state and first excited state of 123,125Sn can be distinguished clearly by our experiment, the neutron spectroscopic factories of 123,125Sn are more reliable.

Experimental Study of the Neutron Spectroscopic Factors in 122~125Sn

Several Tin isotopes are on the path of slow neutron capture (s-) process, and the direct components of (n, γ) reactions can be derived from their neutron spectroscopic factors. In the present work, the angular distributions of ^122,124Sn(p, d) and (d, p) reactions are obtained using the high-precision Q3D magnetic spectrograph in Beijing HI-13 tandem accelerator in China Institute of Atomic Energy. The distorted-wave Born approximation (DWBA) calculations are performed to extract the neutron spectroscopic factors of the ground state of ^122-125Sn and the first excited state of ^123,125Sn. The neutron spectroscopic factors of the ground state of ¹²²Sn and ¹²⁴Sn are firstly obtained in this work. As the events of the ground state and first excited state of ^123,125Sn can be distinguished clearly by our experiment, the neutron spectroscopic factories of ^123,125Sn are more reliable.