Zakład Doświadczalnej Fizyki Komputerowej » radioactive ions http://zdfk.if.uj.edu.pl neutrino physics, low background detectors, dark matter search Thu, 29 Jan 2026 12:26:30 +0000 en-US hourly 1 http://wordpress.org/?v=3.5.1 2014: Observation and modeling of 222Rn daughters in liquid nitrogen http://zdfk.if.uj.edu.pl/?p=1263 http://zdfk.if.uj.edu.pl/?p=1263#comments Mon, 03 Feb 2014 11:36:08 +0000 misiaszek http://zdfk.if.uj.edu.pl/?p=1263 NIM A (2014)

N. Frodyma, K. Pelczar,  M. Wójcik

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http://dx.doi.org/10.1016/j.nima.2014.01.039

Abstract

The results of alpha spectrometric measurements of the activity of 222Rn daughters dissolved in liquefied nitrogen are presented. A direct detection method of ionized alpha-emitters from the 222Rn decay chain (214Po and 218Po) in a cryogenic liquid in the presence of an external electric field is shown. Properties of the radioactive ions are derived from a proposed model of ion production and transport in the cryogenic liquid. Ionic life-time of the ions was found to be on the order of 10 s in liquid nitrogen (4.0 purity class). The presence of positive and negative ions was observed.

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