Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2001-06-08
Phys.Lett. B524 (2002) 245-251
Physics
High Energy Physics
High Energy Physics - Experiment
11 pages, including 5 encapsulated postscript figures
Scientific paper
10.1016/S0370-2693(01)01411-3
Results of observations of low energy nuclear and electron recoil events in liquid xenon scintillator detectors are given. The relative scintillation efficiency for nuclear recoils is 0.22 +/- 0.01 in the recoil energy range 40 keV - 70 keV. Under the assumption of a single dominant decay component to the scintillation pulse-shape the log-normal mean parameter T0 of the maximum likelihood estimator of the decay time constant for 6 keV < Eee < 30 keV nuclear recoil events is equal to 21.0 ns +/- 0.5 ns. It is observed that for electron recoils T0 rises slowly with energy, having a value ~ 30 ns at Eee ~ 15 keV. Electron and nuclear recoil pulse-shapes are found to be well fitted by single exponential functions although some evidence is found for a double exponential form for the nuclear recoil pulse-shape.
Akimov Dmitri
Bewick A.
Davidge David
Dawson James
Howard Samuel A.
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