Half-life determination of 215At and 221Ra with high-purity radioactive ion beams

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

doi:10.1016/j.apradiso.2024.111289

Half-life determination of ²¹⁵At and ²²¹Ra with high-purity radioactive ion beams

Appl Radiat Isot. 2024 Jun:208:111289. doi: 10.1016/j.apradiso.2024.111289. Epub 2024 Mar 13.

Authors

S Bara¹, E Jajčišinová², T E Cocolios³, B Andel⁴, S Antalic⁴, A Camaiani⁵, C Costache⁶, K Dockx³, G J Farooq-Smith⁷, A Kellerbauer⁸, R Lica⁶, K M Lynch⁹, P Marini¹⁰, M Piersa-Siłkowska¹¹, S T Stegemann¹², M Stryjczyk¹³, D Treasa¹⁰, P Van Duppen³

Affiliations

¹ KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001, Leuven, Belgium. Electronic address: [email protected].
² KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001, Leuven, Belgium; European Commission, Joint Research Centre (JRC), Karlsruhe, Germany. Electronic address: [email protected].
³ KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001, Leuven, Belgium.
⁴ Department of Nuclear Physics and Biophysics, Comenius University in Bratislava, 84248, Bratislava, Slovakia.
⁵ KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001, Leuven, Belgium; Dipartimento di Fisica, Università di Firenze, I-50019, Sesto Fiorentino, Italy; Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, I-50019, Sesto Fiorentino, Italy.
⁶ Horia Hulubei National Institute for Physics and Nuclear Engineering, RO-077125, Bucharest, Romania.
⁷ KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001, Leuven, Belgium; Department of Oncology Physics, Edinburgh Cancer Centre, Western General Hospital, Edinburgh, United Kingdom.
⁸ European Commission, Joint Research Centre (JRC), Karlsruhe, Germany.
⁹ School of Physics and Astronomy, The University of Manchester, M13 9PL, Manchester, United Kingdom.
¹⁰ University of Bordeaux, CNRS, LP2I, UMR 5797, F-33170, Gradignan, France.
¹¹ CERN, CH-1211, Geneve 23, Switzerland; Faculty of Physics, University of Warsaw, PL 02-093, Warsaw, Poland.
¹² KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001, Leuven, Belgium; CERN, CH-1211, Geneve 23, Switzerland.
¹³ KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001, Leuven, Belgium; University of Jyvaskyla, Department of Physics, Accelerator laboratory, P.O. Box 35, FI-40014 University of Jyvaskyla, Finland; Helsinki Institute of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.

PMID: 38508063
DOI: 10.1016/j.apradiso.2024.111289

Abstract

At CERN-ISOLDE, high-purity radioactive ion beams of ²¹⁹Fr and ²²¹RaF were investigated with α-decay spectroscopy at the CRIS and ASET experiments in the course of three different experimental campaigns. The half-life of ²¹⁵At, α-decay daughter of ²¹⁹Fr, is measured to be 36.3(3)[9]μs, and that of ²²¹Ra 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.

Keywords: Astatine; Exotic isotopes; Francium; Half-life.; Radium.