强脉冲中子俘获反应中单个γ射线的圆偏振测量
Circular polarization measurement for individual gamma rays in capture reactions with intense pulsed neutrons
AI总结：
本研究建造并评估基于磁性康普顿散射的γ射线偏振仪，并在极化中子³²S(n⃗,γ)³³S反应中演示单γ射线圆偏振测量，以支持核态自旋宇称及复合核宇称不守恒研究。
摘要：
测量中子俘获反应所发射γ射线的圆偏振，可为核物理研究提供有价值的信息。通过测量极化中子俘获反应产生的圆偏振，可以确定激发态的自旋和宇称。此外，中子俘获共振中的γ射线圆偏振，对于研究复合核中宇称不守恒的增强效应至关重要。γ射线圆偏振可使用基于磁性康普顿散射的偏振仪进行测量。研究人员建造了一台偏振仪，并利用圆偏振γ射线束评估了其性能指标。此外，作为演示，还在极化中子的³²S(n⃗,γ)³³S反应中测量了γ射线圆偏振。
英文摘要：
Measurements of circular polarization of $γ$-ray emitted from neutron capture reactions provide valuable information for nuclear physics studies. The spin and parity of excited states can be determined by measuring the circular polarization from polarized neutron capture reactions. Furthermore, the $γ$-ray circular polarization in a neutron capture resonance is crucial for studying the enhancement effect of parity nonconservation in compound nuclei. The $γ$-ray circular polarization can be measured using a polarimeter based on magnetic Compton scattering. A polarimeter was constructed, and its performance indicators were evaluated using a circularly polarized $γ$-ray beam. Furthermore, as a demonstration, the $γ$-ray circular polarization was measured in $^{32}$S($\vec{\textrm{n}}$,$γ$)$^{33}$S reactions with polarized neutrons.
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