Measurement of the 7 Li ( ? , t ) 4 He ground-state cross section between E ? = 4.4 and 10 MeV
Measurement of the 7 Li ( ? , t ) 4 He ground-state cross section between E ? = 4.4 and 10 MeV
复制标题
7 Li(?,t) 4 He 基态截面E ? 之间的测量
DOI：
10.1103/physrevc.101.055801
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发表时间：
2020
影响因子：
3.1
通讯作者：
Munch M
中科院分区：
文献类型：
--
作者：
Munch M
首次使用高强度伽马射线源能量在 4.4 至 10 MeV 之间的单能射线测量了基态截面。该反应对于解决原始李问题以及测试我们对镜像捕获反应的理解非常重要。尽管在过去 30 年中，大多数反应测量都集中在低于 MeV 的能量范围内，但较高能量下的测量可能会限制对天体物理重要能量的外推。用于测量反应的实验装置包括大面积硅探测器阵列和多个光束表征仪器。使用矩阵形式拟合从当前数据计算出的实验天体物理因子。结果与先前在相同能量范围内的实验测量结果不一致，但外推因子与势模型计算和较低能量实验数据一致。
Theground state cross section was measured for the first time using monoenergeticrays with energies between 4.4 and 10 MeV at the High Intensity Gamma-ray Source. The reaction is important for the primordial Li problem and for testing our understanding of the mirror-capture reactionsand. Although over the last 30 years most measurements of thereaction have concentrated in an energy range belowMeV, measurements at higher energies could potentially restrict the extrapolation to astrophysically important energies. The experimental arrangement for measuring thereaction included a large-area silicon detector array and several beam characterization instruments. The experimental astrophysicalfactor ofcalculated from the present data was fitted using the-matrix formalism. The results are in disagreement with previous experimental measurements in the same energy range but the extrapolatedfactor agrees with the potential model calculation and lower energy experimental data.