Ultra-Low Energy Calibration of LUX Detector using $^{127}$Xe Electron Capture
Abstract
We report an absolute calibration of the ionization yields(\textit{Q_y}) and fluctuations for electronic recoil events in liquid xenon at discrete energies between 186 eV and 33.2 keV. The average electric field applied across the liquid xenon target is 180 V/cm. The data are obtained using low energy Xe electron capture decay events from the 95.0-day first run from LUX (WS2013) in search of Weakly Interacting Massive Particles (WIMPs). The sequence of gamma-ray and X-ray cascades associated with I de-excitations produces clearly identified 2-vertex events in the LUX detector. We observe the K- (binding energy, 33.2 keV), L- (5.2 keV), M- (1.1 keV), and N- (186 eV) shell cascade events and verify that the relative ratio of observed events for each shell agrees with calculations. The N-shell cascade analysis includes single extracted electron (SE) events and represents the lowest-energy electronic recoil measurements that have been explored in liquid xenon.
Keywords
Cite
@article{arxiv.1709.00800,
title = {Ultra-Low Energy Calibration of LUX Detector using $^{127}$Xe Electron Capture},
author = {LUX Collaboration and D. S. Akerib and S. Alsum and H. M. Araújo and X. Bai and A. J. Bailey and J. Balajthy and P. Beltrame and E. P. Bernard and A. Bernstein and T. P. Biesiadzinski and E. M. Boulton and P. Brás and D. Byram and S. B. Cahn and M. C. Carmona-Benitez and C. Chan and A. Currie and J. E. Cutter and T. J. R. Davison and A. Dobi and E. Druszkiewicz and B. N. Edwards and S. R. Fallon and A. Fan and S. Fiorucci and R. J. Gaitskell and J. Genovesi and C. Ghag and M. G. D. Gilchriese and C. R. Hall and M. Hanhardt and S. J. Haselschwardt and S. A. Hertel and D. P. Hogan and M. Horn and D. Q. Huang and C. M. Ignarra and R. G. Jacobsen and W. Ji and K. Kamdin and K. Kazkaz and D. Khaitan and R. Knoche and N. A. Larsen and B. G. Lenardo and K. T. Lesko and A. Lindote and M. I. Lopes and A. Manalaysay and R. L. Mannino and M. F. Marzioni and D. N. McKinsey and D. M. Mei and J. Mock and M. Moongweluwan and J. A. Morad and A. St. J. Murphy and C. Nehrkorn and H. N. Nelson and F. Neves and K. O'Sullivan and K. C. Oliver-Mallory and K. J. Palladino and E. K. Pease and C. Rhyne and S. Shaw and T. A. Shutt and C. Silva and M. Solmaz and V. N. Solovov and P. Sorensen and T. J. Sumner and M. Szydagis and D. J. Taylor and W. C. Taylor and B. P. Tennyson and P. A. Terman and D. R. Tiedt and W. H. To and M. Tripathi and L. Tvrznikova and S. Uvarov and V. Velan and J. R. Verbus and R. C. Webb and J. T. White and T. J. Whitis and M. S. Witherell and F. L. H. Wolfs and J. Xu and K. Yazdani and S. K. Young and C. Zhang},
journal= {arXiv preprint arXiv:1709.00800},
year = {2018}
}
Comments
10 pages, 10 figures, 2 tables