标题： 首次测量极化$^{129}$Xe 和$^{131}$Xe 核中的中子双折射现象 显示英文标题

标题： First Measurement of Neutron Birefringence in Polarized $^{129}$Xe and $^{131}$Xe Nuclei

摘要： 我们首次测量了极化中子通过核极化的$^{129}$Xe 和$^{131}$Xe 气体的透射偏振双折射，并首次确定了中子非相干散射长度$b_i(^{129}Xe)=0.186\pm(0.021)_{stat.}\pm(0.004)_{syst.}\space\text{ fm}$和$b_i(^{131}Xe)=2.09\pm(0.29)_{stat.}\pm(0.12)_{syst.}\space\text{ fm}$。 这些结果确定了解释极化氙集合体自旋相关的中子散射研究所需的基本参数，可能的未来应用范围从时间反演破坏的测试到核极化系统的模式纠缠中子散射实验。 显示英文摘要

摘要： We present the first measurements of polarized neutron birefringence in transmission through nuclear-polarized $^{129}$Xe and $^{131}$Xe gas and determine the neutron incoherent scattering lengths $b_i(^{129}Xe)=0.186\pm(0.021)_{stat.}\pm(0.004)_{syst.}\space\text{ fm}$ and $b_i(^{131}Xe)=2.09\pm(0.29)_{stat.}\pm(0.12)_{syst.}\space\text{ fm}$ for the first time. These results determine the essential parameter needed for interpretation of spin-dependent neutron-scattering studies on polarized xenon ensembles, with possible future applications ranging from tests of time-reversal violation to mode-entangled neutron scattering experiments on nuclear-polarized systems.