https://doi.org/10.1140/epja/s10050-025-01746-8
Letter
Emission intensities of gamma transitions in 
U alpha decay
1
Institute for Nuclear Research of NASU, 03028, Kyiv, Ukraine
2
Institute of Experimental and Applied Physics, CTU Prague, CA-11000, Prague, Czech Republic
a dkasper@kinr.kiev.ua, casper.phys@gmail.com
Received:
2
July
2025
Accepted:
10
November
2025
Published online:
21
November
2025
New experimental values for the 
-ray emission intensities in the decay of 
U have been obtained by measurements of a 230-g certified triuranium octoxide sample enriched in U to 93.2% with a 70 cm
high-purity germanium detector over 1111 h. Calibration of energy scale and detection efficiency was performed by using peaks of U, 
Pa, and U/Th series daughters. The revised intensities account for cascade summation, random coincidences, and interference from -rays of other nuclides. Intensities of several transitions were found to have been significantly overestimated in earlier studies, by up to two orders of magnitude.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
