Akerib, DS;
Alsum, S;
Araujo, HM;
Bai, X;
Bailey, AJ;
Balaithy, J;
Beltrame, P;
... Zhang, C; + view all
(2017)
Ultralow energy calibration of LUX detector using Xe-127 electron capture.
Physical Review D
, 96
(11)
, Article 112011. 10.1103/PhysRevD.96.112011.
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Abstract
We report an absolute calibration of the ionization yields ( 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 127 Xe electron capture decay events from the 95.0-day first run from LUX (WS2013) in search of weakly interacting massive particles. The sequence of gamma-ray and x-ray cascades associated with 127 I deexcitations produces clearly identified two-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 in situ measurements that have been explored in liquid xenon.
| Type: | Article |
|---|---|
| Title: | Ultralow energy calibration of LUX detector using Xe-127 electron capture |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevD.96.112011 |
| Publisher version: | https://doi.org/10.1103/PhysRevD.96.112011 |
| Language: | English |
| Additional information: | This is the published version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10054543 |
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