TY  - JOUR
AU  - XENON Collaboration (Aprile, E. et al
AU  - Orrigo, S. E. A.
PY  - 2017
DA  - 2017//
TI  - Results from a calibration of XENON100 using a source of dissolved radon-220
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 072008
EP  - 10pp
VL  - 95
IS  - 7
PB  - Amer Physical Soc
AB  - A Rn-220 source is deployed on the XENON100 dark matter detector in order to address the challenges in calibration of tonne-scale liquid noble element detectors. We show that the Pb-212 beta emission can be used for low-energy electronic recoil calibration in searches for dark matter. The isotope spreads throughout the entire active region of the detector, and its activity naturally decays below background level within a week after the source is closed. We find no increase in the activity of the troublesome Rn-222 background after calibration. Alpha emitters are also distributed throughout the detector and facilitate calibration of its response to Rn-222. Using the delayed coincidence of Rn-220-Po-216, we map for the first time the convective motion of particles in the XENON100 detector. Additionally, we make a competitive measurement of the half-life of Po-212, t(1/2) = (293.9 +/- (1.0)(stat) +/- (0.6)(sys)) ns.
SN  - 2470-0010
UR  - http://arxiv.org/abs/1611.03585
UR  - https://doi.org/10.1103/PhysRevD.95.072008
DO  - 10.1103/PhysRevD.95.072008
LA  - English
N1  - WOS:000399945500001
ID  - XENONCollaborationAprile+Orrigo2017
ER  -