New cross-section measurements of the (n,2n), (n,p) and (n,a) reactions on bromine in the 14 MeV region with detailed uncertainty quantification
New cross-section measurements of the (n,2n), (n,p) and (n,a) reactions on bromine in the 14 MeV region with detailed uncertainty quantification
复制标题
在 14 MeV 区域对溴的 (n,2n)、(n,p) 和 (n,a) 反应进行新的横截面测量，并具有详细的不确定性量化
DOI：
10.1088/1674-1137/aca9bf
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发表时间：
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影响因子：
3.6
通讯作者：
Li Jiang
中科院分区：
文献类型：
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作者：
Long He;Junhua Luo;Li Jiang
用脱机γ射线能谱法和中子活化法测量了79 Br (n, 2n) 78 Br、81 Br (n, p) 81m Se、81 Br (n, α) 78 As和79 Br (n, α) 76 As反应的截面，测量结果分别为：13.5±0.2、14.1±0.2、14.4±0.2和14.8±0.2 MeV，相对于标准的93 Nb (n, 2n) 92m Nb和27 Al (n, α) 24na参考反应。在中国工程物理研究院，利用装有固体3h - ti靶的K-400中子发生器，通过3h (d, n) 4 He反应产生了单能中子。用高纯锗检测器测定了反应产物的活性。在13-15 MeV中子能量范围内测量了溴同位素上（n, 2n）、（n, p）和（n, α）反应的截面。采用协方差分析方法对测量截面数据中的任何不确定性进行彻底检查。将观察结果与先前发表的数据进行讨论和比较，特别是与JENDL-4.0、JEFF-3.3、TENDL-2019和ENDF/B-VIII的结果进行比较。用TALYS-1.95程序推导出的理论激励函数曲线。在13-15 MeV中子能量范围内，研究过程的截面限制将得到改进，这将有助于提高相关数据库的质量。此外，还可以利用这些数据对相关核反应模型的参数进行验证。
Measurement of the cross-sections of the 79 Br (n, 2n) 78 Br, 81 Br (n, p) 81m Se, 81 Br (n, α) 78 As, and 79 Br (n, α) 76 As reactions was performed at specific neutron energies, precisely, 13.5±0.2, 14.1±0.2, 14.4±0.2, and 14.8±0.2 MeV, relative to the standard 93 Nb (n, 2n) 92m Nb and 27 Al (n, α) 24 Na reference reactions using offline γ-ray spectrometry and neutron activation. Monoenergetic neutrons were generated at the China Academy of Engineering Physics via a 3 H (d, n) 4 He reaction using the K-400 Neutron Generator equipped with a solid 3 H-Ti based target. The activity of the reaction produce was obtained using a high-purity germanium detector. The cross-sections of the (n, 2n),(n, p), and (n, α) reactions on the bromine isotopes were measured in the 13–15 MeV neutron energy range. The covariance analysis approach was employed for a thorough inspection of any uncertainties within the measured cross-section data. A discussion and comparison of the observed outcome were carried out with previously published data, especially with the results of the JENDL-4.0, JEFF-3.3, TENDL-2019, and ENDF/B-VIII. 0 data libraries, along with the theoretical excitation function curve derived by employing the TALYS-1.95 program. Improved cross-section restrictions for the investigated processes in the 13–15 MeV neutron energy range will be obtained using the current findings, which will help to raise the caliber of associated databases. Furthermore, the parameters of relevant nuclear reaction models can be verified using this data.