Performance of a gas electroluminescence x-ray detector filled with an argon-xenon mixture

The performance characteristics of a gas electroluminescence X-ray detector (DELG) filled with an Ar + Xe mixture in a range of Xe concentrations of 5–100% were investigated. For a mixture of 80% Ar + 20% Xe, an improvement of the energy resolution is observed with an increase in the gaseous-mixture pres-sure. The best result obtained at a pressure of 3 atm is 7.25% (MnK α, 5.9 eV), which is higher than the data known from the literature by 0.5%. The peak/valley parameter for the same mixture amounts to a value of 650 for an energy of 5.9 keV compared to a value of 200 for pure Xe. The energy resolution of the DELG is suitable for use in X-ray diffractometry for effective suppression of K β lines of characteristic radiation of the main anodes of X-ray tubes.