EXO-200 measured the absolute ionization and scintillation yields of liquid xenon at 1.1-2.6 MeV, finding a W-value of 11.5 eV and a recombination-independent energy scale about 15% below the NEST simulation prediction.
Experimental study of ionization yield of liquid xenon for electron recoils in the energy range 2.8 - 80 keV
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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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Measurement of the scintillation and ionization response of liquid xenon at MeV energies in the EXO-200 experiment
EXO-200 measured the absolute ionization and scintillation yields of liquid xenon at 1.1-2.6 MeV, finding a W-value of 11.5 eV and a recombination-independent energy scale about 15% below the NEST simulation prediction.