Abstract
Experimental values of the x-ray quantum efficiency of krypton, argon and neon scintillation counters for chromium, cobalt and copper K radiation are determined by comparison with a proportional counter, and the results analysed in terms of the energy conversion efficiency of the gas atoms and statistical losses in the photomultiplier. The particular geometry and operating conditions described give maximum efficiencies at the Cu Kα wavelength of 14% for krypton, 4·3% for argon and 3·5% for neon, falling with increase of wavelength. Application of a large electric field to the gas results in practical efficiencies approaching 100% due to gas amplification processes.
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