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19 January 2025

» arxiv » 2301.00460

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First Measurement of Neutron Birefringence in Polarized $^{129}$Xe and $^{131}$Xe Nuclei
H. Lu ; M. J. Barlow ; D. Basler ; P. Gutfreund ; O. Holderer ; A. Ioffe ; S. Pasini ; P. Pistel ; Z. Salhi ; K. Zhernenkov ; B. M. Goodson ; W. M. Snow ; E. Babcock ;
Date:	1 Jan 2023
Abstract:	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 $b_i(^{129}Xe)=0.186pm(0.021)_{stat.}pm(0.004)_{syst.}space ext{ fm}$ and $b_i(^{131}Xe)=2.09pm(0.29)_{stat.}pm(0.12)_{syst.}space ext{ fm}$ 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.
Source:	arXiv, 2301.00460
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