TY - JOUR

T1 - Neutral bremsstrahlung electroluminescence in noble liquids

AU - Borisova, E.

AU - Buzulutskov, A.

N1 - Funding Information: This work was supported in part by Russian Science Foundation (project No. 21-72-00014). It was done within the R&D program of the DarkSide-20k experiment. Publisher Copyright: Copyright © 2022 EPLA.

PY - 2022/1

Y1 - 2022/1

N2 - Proportional electroluminescence (EL) is the physical effect used in two-phase dark matter detectors, to optically record in the gas phase the ionization signal produced by particle scattering in the liquid phase. In our previous works the presence of a new EL mechanism in noble gases, namely that of neutral bremsstrahlung (NBrS), was demonstrated both theoretically and experimentally, in addition to the ordinary EL mechanism due to excimer emission. In this work we show that the similar theoretical approach can apply to noble liquids, namely to liquid helium, neon, argon, krypton and xenon. In particular, the photon yields and spectra for NBrS EL in noble liquids have been calculated for the first time, using the electron energy and transport parameters obtained in the framework of Cohen-Lekner and Atrazhev theory. The relevance of the results obtained to the development of noble liquid detectors for dark matter searches and neutrino experiments is discussed.

AB - Proportional electroluminescence (EL) is the physical effect used in two-phase dark matter detectors, to optically record in the gas phase the ionization signal produced by particle scattering in the liquid phase. In our previous works the presence of a new EL mechanism in noble gases, namely that of neutral bremsstrahlung (NBrS), was demonstrated both theoretically and experimentally, in addition to the ordinary EL mechanism due to excimer emission. In this work we show that the similar theoretical approach can apply to noble liquids, namely to liquid helium, neon, argon, krypton and xenon. In particular, the photon yields and spectra for NBrS EL in noble liquids have been calculated for the first time, using the electron energy and transport parameters obtained in the framework of Cohen-Lekner and Atrazhev theory. The relevance of the results obtained to the development of noble liquid detectors for dark matter searches and neutrino experiments is discussed.

UR - http://www.scopus.com/inward/record.url?scp=85129568747&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/681b32ab-7b14-3b13-bccf-17ed226599ae/

U2 - 10.1209/0295-5075/ac4c03

DO - 10.1209/0295-5075/ac4c03

M3 - Article

AN - SCOPUS:85129568747

VL - 137

JO - Europhysics Letters

JF - Europhysics Letters

SN - 0295-5075

IS - 2

M1 - 24002

ER -