Accurate measurements were performed of the photon emission probabilities following the α decay of 235U to 231Th. Sources of highly enriched 235U were characterised in terms of isotopic composition by mass spectrometry and their activities were standardised by means of alpha-particle counting at a low defined solid angle. The standardised sources were subsequently measured by high-resolution γ-ray spectrometry with calibrated high-purity germanium detectors to determine the photon emission probabilities. Four laboratories participated in this work and reported emission probabilities for 33 γ-ray lines. Most of them agree with previously published evaluated data. In addition, new values are proposed for γ-lines which have been measured only once in the past. © 2017 The Authors
Titolo: | Measurement of absolute γ-ray emission probabilities in the decay of 235U |
Autori: | |
Data di pubblicazione: | 2018 |
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Handle: | http://hdl.handle.net/20.500.12079/1454 |
Appare nelle tipologie: | 1.1 Articolo in rivista |