학술논문
Measurements of differential and angle-integrated cross sections for the $^{10}$B($n, {\alpha}$)$^{7}$Li reaction in the neutron energy range from 1.0 eV to 2.5 MeV
Document Type
Working Paper
Author
Jiang, Haoyu; Jiang, Wei; Bai, Huaiyong; Cui, Zengqi; Zhang, Guohui; Fan, Ruirui; Yi, Han; Ning, Changjun; Zhou, Liang; Tang, Jingyu; An, Qi; Bao, Jie; Bao, Yu; Cao, Ping; Chen, Haolei; Chen, Qiping; Chen, Yonghao; Chen, Yukai; Chen, Zhen; Feng, Changqing; Gao, Keqing; Gu, Minhao; Han, Changcai; Han, Zijie; He, Guozhu; He, Yongcheng; Hong, Yang; Huang, Hanxiong; Huang, Weiling; Huang, Xiru; Ji, Xiaolu; Ji, Xuyang; Jiang, Zhijie; Jing, Hantao; Kang, Ling; Kang, Mingtao; Li, Bo; Li, Chao; Li, Jiawen; Li, Lun; Li, Qiang; Li, Xiao; Li, Yang; Liu, Rong; Liu, Shubin; Liu, Xingyan; Luan, Guangyuan; Mu, Qili; Qi, Binbin; Ren, Jie; Ren, Zhizhou; Ruan, Xichao; Song, Zhaohui; Song, Yingpeng; Sun, Hong; Sun, Kang; Sun, Xiaoyang; Sun, Zhijia; Tan, Zhixin; Tang, Hongqing; Tang, Xinyi; Tian, Binbin; Wang, Lijiao; Wang, Pengcheng; Wang, Qi; Wang, Taofeng; Wang, Zhaohui; Wen, Jie; Wen, Zhongwei; Wu, Qingbiao; Wu, Xiaoguang; Wu, Xuan; Xie, Likun; Yang, Yiwei; Yu, Li; Yu, Tao; Yu, Yongji; Zhang, Linhao; Zhang, Qiwei; Zhang, Xianpeng; Zhang, Yuliang; Zhang, Zhiyong; Zhao, Yubin; Zhou, Luping; Zhou, Zuying; Zhu, Danyang; Zhu, Kejun; Zhu, Peng
Source
Subject
Language
Abstract
Differential and angle-integrated cross sections for the $^{10}$B($n, {\alpha}$)$^{7}$Li, $^{10}$B($n, {\alpha}$$_{0}$)$^{7}$Li and $^{10}$B($n, {\alpha}$$_{1}$)$^{7}$Li$^{*}$ reactions have been measured at CSNS Back-n white neutron source. Two enriched (90%) $^{10}$B samples 5.0 cm in diameter and ~85.0 ${\mu}$g/cm$^{2}$ in thickness each with an aluminum backing were prepared, and back-to-back mounted at the sample holder. The charged particles were detected using the silicon-detector array of the Light-charged Particle Detector Array (LPDA) system. The neutron energy E$_{n}$ was determined by TOF (time-of-flight) method, and the valid ${\alpha}$ events were extracted from the E$_{n}$-Amplitude two-dimensional spectrum. With 15 silicon detectors, the differential cross sections of ${\alpha}$-particles were measured from 19.2{\deg} to 160.8{\deg}. Fitted with the Legendre polynomial series, the ($n, {\alpha}$) cross sections were obtained through integration. The absolute cross sections were normalized using the standard cross sections of the $^{10}$B($n, {\alpha}$)$^{7}$Li reaction in the 0.3 - 0.5 MeV neutron energy region. The measurement neutron energy range for the $^{10}$B($n, {\alpha}$)$^{7}$Li reaction is 1.0 eV $\le$ En < 2.5 MeV (67 energy points), and for the $^{10}$B($n, {\alpha}$$_{0}$)$^{7}$Li and $^{10}$B($n, {\alpha}$$_{1}$)$^{7}$Li$^{*}$ reactions is 1.0 eV $\le$ En < 1.0 MeV (59 energy points). The present results have been analyzed by the resonance reaction mechanism and the level structure of the $^{11}$B compound system, and compared with existing measurements and evaluations.
Comment: 19 pages, 34 figures, to be published in Chinese Physics C
Comment: 19 pages, 34 figures, to be published in Chinese Physics C