A new evaluation of the nuclear decay data of 223Ra
1 Horia Hulubei National Institute for Research and Development in Physics and Nuclear Engineering (IFIN-HH), 30 Reactorului street, PO Box MG-6, Magurele, Ilfov county, postcode 077125, Romania
2 CEA, LIST, Laboratoire National Henri Becquerel (LNHB), CEA-Saclay, 91191 Gif-sur-Yvette Cedex, FRANCE
* Corresponding author: firstname.lastname@example.org
Published online: 30 September 2020
Since 2013, the radionuclide 223Ra is used in nuclear medicine to prepare radiopharmaceuticals for targeted radiotherapy. 223Ra is a member of the natural radioactive series of actinium and decays by alpha-particle emission, populating the excited levels of 219Rn. According to the 2011 nuclear decay data evaluation within the Decay Data Evaluation Project (DDEP), by V.P. Chechev, the half-life of 223Ra is (11.43 ± 0.03) days. The decay scheme is not considered as fully complete, because of the disagreement between the measured and calculated probabilities of some alpha-transitions and incomplete information on several gamma-ray transitions. New high quality measurements of 223Ra nuclear decay data were performed and numerous results were published since 2012 and, consequently, an updated nuclear decay data evaluation was undertaken, according to the DDEP procedures. The main results obtained, focusing on the recommended data improvements, are presented and discussed in this paper.
© The Authors, published by EDP Sciences, 2020
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