New isotope Am 231

Physical Review C 2026 Open access

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Authors: J. Khuyagbaatar, Pavol Mošat’, J. Ballof, R. A. Cantemir, Ch. E. Düllmann, Katharina Hermainski, B. Kindler, J. Krier, N. Kurz, S. Löchner, B. Lommel, B. Schausten
+2 more P. Wieczorek, Alexander B. Yakushev
DOI: 10.1103/2clj-zh3s
Cited by: 1
References: 41

Abstract

The present work aimed at the synthesis of the hitherto unknown Am 231 and known Am 229 isotopes via the 4 n evaporation channels of the fusion reactions of Ca 48 + Re 187 and Ca 48 + Re 185 , respectively. The new isotope Am 231 , with a half-life of 47 − 19 + 85 s , was identified on the basis of five observed α -decay chains. It emits α particles with an energy of 7.11(2) MeV. An upper limit of 0.66 was estimated for the electron-capture decay branch of Am 231 . No α -decay chain from Am 229 was observed, corresponding to a cross-section level of 0.03 nb for the detection of a single event. The α -decay properties of Am 231 are discussed in the framework of the Geiger-Nuttall empirical relation.

Fields of Study & Subjects

Nuclear physics research studies Chemical Reactions and Isotopes Radiopharmaceutical Chemistry and Applications

Publication details

Journal / source
Physical Review C
Publisher
American Physical Society (APS)
Volume
114
Issue
1
Publication date
16 June 2026
Language
EN