Title: Alpha-particle emission probabilities of 231Pa derived from first semiconductor spectrometric measurements
Authors: GARCÍA-TORAÑO EDUARDOCRESPO M. T.MAROULI MARIAJOBBAGY VIKTORPOMME STEFAANIVANOV PETER
Citation: APPLIED RADIATION AND ISOTOPES vol. 154 p. 108863
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication Year: 2019
JRC N°: JRC116529
ISSN: 0969-8043 (online)
URI: https://www.sciencedirect.com/science/article/pii/S0969804319303951?via%3Dihub
https://publications.jrc.ec.europa.eu/repository/handle/JRC116529
DOI: 10.1016/j.apradiso.2019.108863
Type: Articles in periodicals and books
Abstract: The nuclide 231Pa is a member of the 235U decay chain. It is a complex alpha emitter with 25 identified alpha emissions. Formerly published alpha-particle emission probabilities were derived from measurements taken with magnetic spectrometers. This work presents the first measurements made with semiconductor detectors. High-resolution alpha-particle spectrometry was carried out at CIEMAT and JRC using ion-implanted planar silicon detectors. Alpha-particle emission probabilities of 23 transitions were derived from deconvolutions of the spectra. For the major lines, uncertainties are lower than 1%, a significant improvement to existing data. The new data set will allow a more accurate evaluation of the decay scheme of 231Pa.
JRC Directorate:Nuclear Safety and Security

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