Scintillation luminescence for high-pressure xenon gas

Ionization and scintillation response of high-pressure xenon gas to alpha particles

“…For example, the authors of [34] and [35] measure that the number of scintillation photons decreases monotonously with the electric field, and that the scintillation yield in the field-independent region is about 40% of that at zero electric field for 10 bar xenon gas pressure. In addition, in liquid xenon, recombination effects have also shown to produce event-by-event, anti-correlated, fluctuations between the ionization and scintillation signals [36,37].…”

Fluctuation of ionization, scintillation and proportional scintillation yields due to alpha-particles in gaseous xenon under normal pressures

“…For this application, the scintillation photons are good signals to trigger a circuit for measuring drift times of electron swarms, which are produced by a Compton recoil electron of for example 100 keV. The recoil electron of 100 keV produces about 1.7 Â 10 3 photons under the normal pressure and about half of that at a pressure of around 3.0 MPa [19]. In order to make a time reference from these small numbers of photons, it is desirable to test a photodetector such as avalanche photo-diode of high quantum efficiency with internal gain for VUV photons.…”

“…W s -value, which is defined as an average energy per emitted photon in scintillation at a zero electric field, has been studied so [18], and is calculable in the case of 2.6 MPa using the absolute number of emitted photons measured by Kobayashi et al [19]. However, there still exists a large discrepancy between their W s -values.…”

“…However, there still exists a large discrepancy between their W s -values. In addition, fluctuations of the scintillation yields in gaseous xenon have almost never been discussed [17][18][19][20][21].…”

Primary scintillation characteristics of Ar+CF4 gas mixtures excited by proton and alpha particles

“…Noble gases have unique physical properties, such as high scintillation yields [4], relatively fast decay times [5], near linear responses to charged particles over a wide range of dE/dx [6,7] and large absorption cross sections to thermal neutrons ( 3 He). It is easy to build a good 2p or 4p geometry detector using noble gas scintillators, and the stopping power can be controlled by varying the gas pressure.…”