Open Access
- 16 June 2026
- journal article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 114 (1)
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.Keywords
Funding Information
- Bundesministerium für Forschung, Technologie und Raumfahrt (05P24UM3)
- GSI Helmholtzzentrum für Schwerionenforschung
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