Energy resolution and linearity of XENON1T in the MeV energy rangeShow others and affiliations
Number of Authors: 1422020 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 80, no 8, article id 785
Article in journal (Refereed) Published
Abstract [en]
Xenon dual-phase time projection chambers designed to search for weakly interacting massive particles have so far shown a relative energy resolutionwhich degrades with energy above similar to 200 keV due to the saturation effects. This has limited their sensitivity in the search for rare events like the neutrinoless double-beta decay of Xe-136 at its Q value, Q(beta beta) similar or equal to 2.46 MeV. For the XENON1T dual-phase time projection chamber, we demonstrate that the relative energy resolution at 1 sigma/mu is as low as (0.80 +/- 0.02)% in its one-ton fiducial mass, and for single-site interactions at Q(beta beta). We also present a new signal correction method to rectify the saturation effects of the signal readout system, resulting in more accurate position reconstruction and indirectly improving the energy resolution. The very good result achieved in XENON1T opens up new windows for the xenon dual-phase dark matter detectors to simultaneously search for other rare events.
Place, publisher, year, edition, pages
2020. Vol. 80, no 8, article id 785
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-186652DOI: 10.1140/epjc/s10052-020-8284-0ISI: 000567425100005OAI: oai:DiVA.org:su-186652DiVA, id: diva2:1507199
2020-12-072020-12-072022-02-25Bibliographically approved