A measurement of the mean electronic excitation energy of liquid xenon

Abstract Detectors using liquid xenon as target are widely deployed in rare event searches. Conclusions on the interacting particle rely on a precise reconstruction of the deposited energy which requires calibrations of the energy scale of the detector by means of radioactive sources. However, a mic...

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Autores principales:	Laura Baudis, Patricia Sanchez-Lucas, Kevin Thieme
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/7f7e441705fe42ceb00f59ee93278c88
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spelling	oai:doaj.org-article:7f7e441705fe42ceb00f59ee93278c882021-12-05T12:09:15ZA measurement of the mean electronic excitation energy of liquid xenon10.1140/epjc/s10052-021-09834-x1434-60441434-6052https://doaj.org/article/7f7e441705fe42ceb00f59ee93278c882021-12-01T00:00:00Zhttps://doi.org/10.1140/epjc/s10052-021-09834-xhttps://doaj.org/toc/1434-6044https://doaj.org/toc/1434-6052Abstract Detectors using liquid xenon as target are widely deployed in rare event searches. Conclusions on the interacting particle rely on a precise reconstruction of the deposited energy which requires calibrations of the energy scale of the detector by means of radioactive sources. However, a microscopic calibration, i.e. the translation from the number of excitation quanta into deposited energy, also necessitates good knowledge of the energy required to produce single scintillation photons or ionisation electrons in liquid xenon. The sum of these excitation quanta is directly proportional to the deposited energy in the target. The proportionality constant is the mean excitation energy and is commonly known as W-value. Here we present a measurement of the W-value with electronic recoil interactions in a small dual-phase xenon time projection chamber with a hybrid (photomultiplier tube and silicon photomultipliers) photosensor configuration. Our result is based on calibrations at $$\mathcal {O}(1{-}10\,{\hbox {keV}})$$ O ( 1 - 10 keV ) with internal $${^{37}\hbox {Ar}}$$ 37 Ar and $${^{83\text {m}}\hbox {Kr}}$$ 83 m Kr sources and single electron events. We obtain a value of $$W={11.5}{} \, ^{+0.2}_{-0.3} \, \mathrm {(syst.)} \, \hbox {eV}$$ W = 11.5 - 0.3 + 0.2 ( syst . ) eV , with negligible statistical uncertainty, which is lower than previously measured at these energies. If further confirmed, our result will be relevant for modelling the absolute response of liquid xenon detectors to particle interactions.Laura BaudisPatricia Sanchez-LucasKevin ThiemeSpringerOpenarticleAstrophysicsQB460-466Nuclear and particle physics. Atomic energy. RadioactivityQC770-798ENEuropean Physical Journal C: Particles and Fields, Vol 81, Iss 12, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Laura Baudis Patricia Sanchez-Lucas Kevin Thieme A measurement of the mean electronic excitation energy of liquid xenon
description	Abstract Detectors using liquid xenon as target are widely deployed in rare event searches. Conclusions on the interacting particle rely on a precise reconstruction of the deposited energy which requires calibrations of the energy scale of the detector by means of radioactive sources. However, a microscopic calibration, i.e. the translation from the number of excitation quanta into deposited energy, also necessitates good knowledge of the energy required to produce single scintillation photons or ionisation electrons in liquid xenon. The sum of these excitation quanta is directly proportional to the deposited energy in the target. The proportionality constant is the mean excitation energy and is commonly known as W-value. Here we present a measurement of the W-value with electronic recoil interactions in a small dual-phase xenon time projection chamber with a hybrid (photomultiplier tube and silicon photomultipliers) photosensor configuration. Our result is based on calibrations at $$\mathcal {O}(1{-}10\,{\hbox {keV}})$$ O ( 1 - 10 keV ) with internal $${^{37}\hbox {Ar}}$$ 37 Ar and $${^{83\text {m}}\hbox {Kr}}$$ 83 m Kr sources and single electron events. We obtain a value of $$W={11.5}{} \, ^{+0.2}_{-0.3} \, \mathrm {(syst.)} \, \hbox {eV}$$ W = 11.5 - 0.3 + 0.2 ( syst . ) eV , with negligible statistical uncertainty, which is lower than previously measured at these energies. If further confirmed, our result will be relevant for modelling the absolute response of liquid xenon detectors to particle interactions.
format	article
author	Laura Baudis Patricia Sanchez-Lucas Kevin Thieme
author_facet	Laura Baudis Patricia Sanchez-Lucas Kevin Thieme
author_sort	Laura Baudis
title	A measurement of the mean electronic excitation energy of liquid xenon
title_short	A measurement of the mean electronic excitation energy of liquid xenon
title_full	A measurement of the mean electronic excitation energy of liquid xenon
title_fullStr	A measurement of the mean electronic excitation energy of liquid xenon
title_full_unstemmed	A measurement of the mean electronic excitation energy of liquid xenon
title_sort	measurement of the mean electronic excitation energy of liquid xenon
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/7f7e441705fe42ceb00f59ee93278c88
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A measurement of the mean electronic excitation energy of liquid xenon

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