X-ray ionization yields and energy spectra in liquid argon
arXiv:1505.02296 · doi:10.1016/j.nima.2016.02.010
Abstract
The main purpose of this work is to provide reference data on X-ray ionization yields and energy spectra in liquid Ar to the studies in the field of Cryogenic Avalanche Detectors (CRADs) for rare-event and other experiments, based on liquid Ar detectors. We present the results of two related researches. First, the X-ray recombination coefficients in the energy range of 10-1000 keV and ionization yields at different electric fields, between 0.6 and 2.3 kV/cm, are determined in liquid Ar based on the results of a dedicated experiment. Second, the energy spectra of pulsed X-rays in liquid Ar in the energy range of 15-40 keV, obtained in given experiments including that with the two-phase CRAD, are interpreted and compared to those calculated using a computer program, to correctly determine the absorbed X-ray energy. The X-ray recombination coefficients and ionization yields have for the first time been presented for liquid Ar in systematic way.
13 pages, 9 figures, 3 tables. Submitted to NIM. 2nd version: substantially modified. New Fig. 7: summary of ionization yields in liquid Ar
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- Photon emission and atomic collision processes in two-phase argon doped with xenon and nitrogen
- Two-phase Cryogenic Avalanche Detector with electroluminescence gap operated in argon doped with nitrogen
- Measurement of the ionization yield of nuclear recoils in liquid argon using a two-phase detector with electroluminescence gap
- Further studies of proportional electroluminescence in two-phase argon
- Study of visible-light emission in pure and methane-doped liquid argon
- First observation of neutral bremsstrahlung electroluminescence in liquid argon
- Observation of primary scintillations in the visible range in liquid argon doped with methane
- Characterization of a 109Cd gamma-ray source for the two-phase argon detector