Authors:
H. Yoshikawa Kanazawa University Kakuma-cho, Kanazawa, Ishikawa 920-1192, Japan; Address for correspondence: JAEA, 4-33 Muramatsu, Tokai-mura, Ibraki 319-1194, Japan

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T. Nakanishi Kanazawa University Kakuma-cho, Kanazawa, Ishikawa 920-1192, Japan

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H. Nakahara Tokyo Metropolitan University 1-1 Minami-Ohsawa, Hachioji, Tokyo 192-0397, Japan

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Summary  

A portable liquid scintillation counter was applied for the analysis of alpha-ray energy spectrum to determine the ratio of 220Rn/222Rn in fumarolic gas in the field. A surface-polished vial was developed, by which a Gaussian distribution could be approximated for the alpha-ray energy spectra and the peak areas of the nuclides could be estimated independently, because of the wide FWHM in the liquid scientillation pulse. A fumarolic gas sample was collected in Mt. Kamiyama (Hakoneyama geothermal field in Japan) having low 220Rn/222Rn ratio of 2.20±0.13.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)