Authors:
S. PomméInstitute for Reference Materials and Measurements European Commission, Joint Research Centre Retieseweg 111 B-2440 Geel Belgium

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E. García-TorañoCIEMAT Laboratorio de Metrología de Radiaciones Ionizantes Madrid Spain

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G. SibbensInstitute for Reference Materials and Measurements European Commission, Joint Research Centre Retieseweg 111 B-2440 Geel Belgium

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S. RichterInstitute for Reference Materials and Measurements European Commission, Joint Research Centre Retieseweg 111 B-2440 Geel Belgium

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R. WellumInstitute for Reference Materials and Measurements European Commission, Joint Research Centre Retieseweg 111 B-2440 Geel Belgium

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A. StolarzInstitute for Reference Materials and Measurements European Commission, Joint Research Centre Retieseweg 111 B-2440 Geel Belgium

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A. AlonsoInstitute for Reference Materials and Measurements European Commission, Joint Research Centre Retieseweg 111 B-2440 Geel Belgium

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Abstract  

High-resolution alpha-particle spectrometry was performed on three uranium materials enriched in 235U. Besides the 235U peaks, separate peaks belonging to impurity traces of 234U could be quantified. Relying on the isotopic composition of the uranium, as determined by mass spectrometry, the ratio of the half-lives of 238U and 235U was determined via the activity ratio of 234U and 235U in the materials. As an intermediate link, the 234U/238U half-life ratio was taken from published mass spectrometric analyses of ‘secular equilibrium’ uranium material. The resulting half-life ratio T1/2(238U)/T1/2(235U) = 6.351±0.031 is in agreement with the commonly adopted half-life values determined by Jaffey et al.

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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)