Authors:
T. Honda Musashi Institute of Technology Atomic Energy Research Laboratory 971 Ozenji, Asaoku 215 Kawasakishi, Kanagawa (Japan)

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T. Oi Sophia University Department of Chemistry 7-1 Kioicho, Chiyodaku 102 Tokyo (Japan)

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T. Ossaka Sophia University Department of Chemistry 7-1 Kioicho, Chiyodaku 102 Tokyo (Japan)

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T. Nozaki Musashi Institute of Technology Atomic Energy Research Laboratory 971 Ozenji, Asaoku 215 Kawasakishi, Kanagawa (Japan)

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H. Kakihana Sophia University Department of Chemistry 7-1 Kioicho, Chiyodaku 102 Tokyo (Japan)

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Abstract  

Determination of Th and U in acidic hot spring and crater lake waters was investigated by neutron activation analysis (NAA). Before neutron irradiation, Th and U were preconcentrated and separated from interfering nuclides such as alkali metals and halogens by coprecipitation with aluminium. Irradiation was carried out in two ways, viz., irradiation with Cd foil wrapping (epithermal NAA) and irradiation without Cd foil wrapping (normal NAA). The final determined values of Th and U were at ppb levels. Higher reliability of the determined values was obtained for Th than for U. It was found that epithermal NAA was more effective for the determination of these two actinides than normal NAA and was more effective for the determination of U than that of Th.

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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)