Electroluminescence yield for λ > 165 nm in neon-xenon mixtures: Experimental results

The electroluminescence yield for λ > 165 am in different neon-xenon mixtures is studied as a function of the reduced electric field. These studies were performed using a uniform-field gas proportional scintillation counter. The experimental values obtained for the scintillation and ionization thresholds decrease from approximately 1 and 6 Vcm-1 torr-1 for 100% xenon, to about 0.5 and 3.8 Vcm-1 torr-1 for 20% xenon, to 0.4 and 2.8 Vcm-1 torr-1 for 10% xenon and to 0.3 and 2.2 Vcm-1 torr-1 for 5% xenon. Detector energy resolutions for the Al K line (1.5 keV) are 15% for 20% xenon, 19% for 10% xenon and 22% for 5% xenon