Experimental study of ionization yield of liquid xenon for electron recoils in the energy range 2.8 - 80 keV
D.Yu. Akimov, V.V. Afanasyev, I.S. Alexandrov, V.A. Belov, A.I., Bolozdynya, A.A. Burenkov, Yu.V. Efremenko, D.A. Egorov, A.V. Etenko, M.A., Gulin, S.V. Ivakhin, V.A. Kaplin, A.K. Karelin, A.V. Khromov, M.A. Kirsanov,, S.G. Klimanov, A.S. Kobyakin, A.M. Konovalov, A.G. Kovalenko
TL;DR
This study experimentally measures the ionization yield of liquid xenon for electron recoils between 2.8 and 80 keV, confirming that yield increases as energy decreases below 10 keV, aligning with theoretical predictions.
Contribution
First experimental measurement of ionization yield for electron recoils in liquid xenon below 100 keV, validating energy dependence predicted by models.
Findings
Ionization yield increases as energy decreases below 10 keV.
Decay time of scintillation at 2.82 keV measured to be 25 +/- 3 ns.
Results support NEST model predictions for low-energy electron recoils.
Abstract
We present the results of the first experimental study of ionization yield of electron recoils with energies below 100 keV produced in liquid xenon by the isotopes: 37Ar, 83mKr, 241Am, 129Xe, 131Xe. It is confirmed by a direct measurement with 37Ar isotope (2.82 keV) that the ionization yield is growing up with the energy decrease in the energy range below ~ 10 keV accordingly to the NEST predictions. Decay time of scintillation at 2.82 keV is measured to be 25 +/- 3 ns at the electric field of 3.75 kV/cm.
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