Intense Vacuum-Ultraviolet and Infrared Scintillation of Liquid Ar-Xe Mixtures

Understand

Vacuum ultraviolet light emission from xenon-doped liquid argon is described in the context of liquid noble gas particle detectors.

• Xenon concentrations in liquid argon from 0.1 ppm to 1000 ppm were studied.
• The energy transfer from the second excimer continuum of argon ($\sim$127 nm) to the second excimer continuum of xenon ($\sim$174 nm) is observed by recording optical emission spectra.
• The transfer almost saturates at a xenon concentration of $\sim$10 ppm for which, in addition, an intense emission in the infrared at a peak wavelength of 1.17 $\mu$m with (13000$\pm$4000) photons per MeV deposited by electrons had been found.