Measurement of the parity-odd angular distribution of γ rays from polarized neutron capture on Cl35
Measurement of the parity-odd angular distribution of γ rays from polarized neutron capture on Cl35
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Cl35 极化中子俘获γ射线奇偶角分布的测量
DOI：
10.1103/physrevc.106.015504
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发表时间：
2022
影响因子：
3.1
通讯作者：
Bowman, J. D.
中科院分区：
文献类型：
--
作者：
Fomin, N.;Alarcon, R.;Alonzi, L.;Askanazi, E.;Baeßler, S.;Balascuta, S.;Barrón-Palos, L.;Barzilov, A.;Blyth, D.;Bowman, J. D.
我们报告了对原子核上极化慢中子俘获的两种能量加权级联角分布的测量，一种奇偶校验相关性与 成正比，一种奇偶校验相关性与 成正比。由于核子-核子相互作用较弱，该反应中可能会出现宇称破坏不对称性，该相互作用在慢速中子俘获时形成的激发复合核中混合了相反的宇称 S 波和 P 波水平。如果宇称破坏 (PV) 和宇称守恒 (PC) 项同时存在，则测量的微分截面可以通过以下方式与它们相关联。对 2.27–9.53 meV 中子能量平均的极化慢中子俘获能量加权级联角分布的 PV 和 PC 不对称性进行了测量。这些结果与之前的实验结果一致。系统误差被量化并显示与统计误差相比很小。俘获极化中子所发射的射线角分布的这些不对称性被用来验证 NPDGamma 实验的操作和数据分析程序，该实验测量了质子上的极化慢中子俘获所发射的射线角分布的奇偶不对称性。
We report a measurement of two energy-weightedcascade angular distributions from polarized slow neutron capture on thenucleus, one parity-odd correlation proportional toand one parity-even correlation proportional to. A parity-violating asymmetry can appear in this reaction due to the weak nucleon-nucleon interaction, which mixes opposite parity S- and P-wave levels in the excited compoundnucleus formed upon slow neutron capture. If parity-violating (PV) and parity-conserving (PC) terms both exist, the measured differential cross section can be related to them via. The PV and PC asymmetries for energy-weightedcascade angular distributions for polarized slow neutron capture onaveraged over the neutron energies from 2.27–9.53 meV were measured to beand. These results are consistent with previous experimental results. Systematic errors were quantified and shown to be small compared to the statistical error. These asymmetries in the angular distributions of therays emitted from the capture of polarized neutrons inwere used to verify the operation and data analysis procedures for the NPDGamma experiment, which measured the parity-odd asymmetry in the angular distribution ofs from polarized slow neutron capture on protons.