A method for determination of deuterium impurity in the helium beam

Deep Underground Laboratory Measurement of C13(α,n)OGao1, Jiao2, Li3 et al. 2022Phys. Rev. Lett.230201View full textAdd to dashboardCite

“…The absolute beam energy was determined to an accuracy of 0.5 keV with an energy spread of less than 0.2 keV [33]. A 90 • dipole magnet with a mass resolution of 250 was used together with a set of analyzing slits to eliminate the H + 2 /D + contamination in the 4 He 2+ beam [34]. A clear separation of 4 He 2+ from the other impurities was observed at the slit position and the count ratio of the inner and outer rings of the 3 He detector array indicated that no neutrons came from the deuterium impurity.…”

Data analysis for <sup>13</sup>C(<italic>α</italic>, n)<sup>16</sup>O reaction based on Bayesian neural network method

“…LUNA 分别用 50 kV 和 400 kV 加速器开展了多个核 天 体 反 应 测 量 , 如 22 Ne(p, ) 23 Na [6] , 15 N(p, ) 16 O [7] , 17 O(p, α) 14 N [8] 等. JUNA 拥有 ECR (electron cyclotron resonance) 源 驱 动 的 400 kV 强 流 加 速 器 [9][10][11][12][13] , BGO(Bi4Ge3O12)探测器阵列 [14] , 中子探测器阵列 [15,16] 及先进靶制备技术 [17][18][19][20][21] 等, 一期实验在伽莫夫窗口 测 量 了 多 个 关 键 核 天 体 反 应 [22] : 19 F(p, αγ) 16 O [23,24] , 13 C( , n) 16 O [25] , 19 F(p, ) 20 Ne [26] , 25 Mg(p, ) 26 Al [27] , 18 O( , ) 22 Ne [28] 和 12 C( , ) 16 O. 13 C( , n) 16 13 N( + ) 13 C(p, ) 14 N 反应链形成富含 13 C 和 14 N 的薄层, 该薄层称为 13 C 袋( 13 C pocket).…”