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

Abstract

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

article Article
date_range 2024
language English
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Featured Keywords

Francium
Radium
Astatine
Exotic isotopes
Half-life.
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