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High-resolution alpha-particle spectrometry of 238U

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The alpha-particle emission probabilities associated with the three main alpha transitions of 238U were measured by high-resolution alpha-particle spectrometry. Highly enriched 238U material was used and its isotopic composition characterised by mass spectrometry. Source production through electrodeposition was optimised to reconcile conflicting demands for good spectral resolution and statistical precision. Measurements were performed at IRMM and CIEMATfor 1-2 years in three different set-ups. A new magnet system was put into use to largely eliminate true coincidence effects with low-energy conversion electrons. Finally the accuracy and precision of the relative emission probabilities for the three transitions – 77.01 (10)%, 22.92 (10)% and 0.068 (10)%, respectively – have been improved significantly.
2014-04-16
PERGAMON-ELSEVIER SCIENCE LTD
JRC82745
0969-8043,   
http://dx.doi.org/10.1016/j.apradiso.2013.11.075,    https://publications.jrc.ec.europa.eu/repository/handle/JRC82745,   
10.1016/j.apradiso.2013.11.075,   
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