Abstract
THE intensity of gas discharges in switching devices for radar duplexers is such that clean-up of the rare-gas filling is an important factor, and may determine the life of such valves. Radioactive krypton, Kr-85 1, has been used for measuring the rate of rare-gas clean-up in pre-T.R. valves, with promising results. Krypton-85 has a half-life of ten years and emits mainly beta radiation (680 keV.) and some gamma radiation (500 keV.). Thus it is a most convenient isotope to use, the radiation being readily detected by Geiger-counter or photographic techniques.
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References
Radioisotope Conference, vol. 2 (1954).
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HARRIS, D., HAWKINS, P. Use of Krypton-85 in measuring Gas Clean-up Rates. Nature 177, 285–286 (1956). https://doi.org/10.1038/177285b0
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DOI: https://doi.org/10.1038/177285b0
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