Short-lived Rn-222 daughters in cryogenic liquids

摘要

In this paper a detection method of a emitters from ~(222)Rn decay chain, present in cryogenic liquids, using bare Si-PIN diodes immersed in the liquids is presented. Properties of ionized ~(222)Rn daughters deduced from conducted measurements are outlined. Life-time of positive ions was found to be of the order of 10 s, and nonzero content of electronegative ions was observed.