Ultralow energy calibration of LUX detector using Xe-127 electron capture - Akerib,DS; Alsum,S; Araujo,HM; Bai,X; Bailey,AJ; Balaithy,J; Beltrame,P; Bernard,EP; Bernstein,A; Biesiadzinski,TP; Boulton,EM; Bras,P; et al. (PHYSICAL REVIEW D, 2017)