Comparative analysis of spectra of the background of the proportional counter filled with Kr, enriched in Kr-78, and with Kr of natural content
Abstract
The results of the experiment searching for 2K-capture with large low-background proportional counter are presented. The comparison of spectra of the background of the proportional counter filled with Kr enriched in 78Kr (8400 hr) and with natural Kr (3039 hr) is given. A new limit on the half-life of 78Kr with regard to 2K-capture, T1/2≥2.0·1021 yrs (95% C.L.) has been obtained.
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