S Bara, E Jajčišinová, T E Cocolios, B Andel, S Antalic, A Camaiani, C Costache, K Dockx, G J Farooq-Smith, A Kellerbauer, R Lica, K M Lynch, P Marini, M Piersa-Siłkowska, S T Stegemann, M Stryjczyk, D Treasa, P Van Duppen
At CERN-ISOLDE, high-purity radioactive ion beams of 219 Fr and 221 RaF were investigated with α-decay spectroscopy at the CRIS and ASET experiments in the course of three different experimental campaigns. The half-life of 215 At, α-decay daughter of 219 Fr, is measured to be 36.3(3)[9]μs, and that of 221 Ra was determined to be 26.2(1)[6]s, both of which are well in line with the trends in this region of the nuclear landscape but at odds with some of the reported literature.
March 13, 2024: Applied Radiation and Isotopes