Mono-energetic positon emission in the decay of 152Eu
作者： Sakae Shimizu , Yasuyuki Nakayama , Haruyoshi Hirata , Hiromasa Mazaki
DOI: 10.1016/0029-5582(64)90411-0
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摘要: Abstract The mono-energetic positon emission of the 1409 keV El transition in 152Sm has been measured using a Siegbahn-Slatis intermediate-image spectrometer. By comparing intensity peak with that internal conversion line same branching ratio for this process determined as (2.5±1.0) × 10−7 per gamma transition, reasonable agreement reported by Perdrisat et al. mean life 1531 level estimated to be τ = 5.7 10−15 sec. From our experimental value and relative intensities it is found retarded, when compared single proton probability, factor at least about 60.
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