Assay of 222Rn in water samples by a modified integral counting method

Yuko Murase, Yoshio Homma, Isao Murakami, Keiko Handa

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5 Citations (Scopus)


222Rn activity concentrations in water collected from 163 private wells and 14 springs in Tokyo were measured with a liquid scintillation spectrometer using a modified integral counting method. The activity concentrations of 222Rn range from 0.2 to 22.9 Bq/L and average 4.8 Bq/L. The errors due to the air luminescence counts and the interferences from 220Rn and 219Rn are discussed and evaluated. 222Rn samples of 0.2 Bq/L can be assayed within an overall uncertainty of 3.1%. The liquid scintillation method involving agitation of the sample water directly with a liquid scintillation cocktail was compared with the present method and evaluated.

Original languageEnglish
Pages (from-to)861-865
Number of pages5
JournalApplied Radiation and Isotopes
Issue number7
Publication statusPublished - 1998 Jul

ASJC Scopus subject areas

  • Radiation


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