Volume 111, Number 5, September 2015
|Number of page(s)||5|
|Published online||11 September 2015|
First measurement of the β-decay half-life of 206Au
1 Università degli Studi di Milano - I-20133 Milano, Italy
2 INFN, Sezione di Milano, I-20133 Milano, Italy
3 Department of Physics, College of Science, University of Kerbala, Kerbala, Iraq
4 Department of Physics, University of Surrey, Guildford, GU2 7XH, UK
5 National Physical laboratory, Teddington, Middelsex, TW11 0LW, UK
6 Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Legnaro, Italy
7 GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
Received: 24 August 2015
Accepted: 31 August 2015
The β decay of the N = 127 isotone 206Au has been investigated at the Gesellschaft für Schwerionenforschung laboratory within the rare isotope investigations at GSI Collaboration. From the experimental data, both its half-life and the level structure of the N = 126 daughter nucleus 206Hg have been extracted. On the basis of the new results, the systematics of Au β-decay half-lives beyond the N = 126 shell closure is discussed. In addition, the interplay between allowed Gamow-Teller and first-forbidden transitions in the N > 126, Z < 82 mass region is reviewed.
PACS: 23.40.-s – β decay; double β decay; electron and muon capture / 26.30.Hj – r-process / 27.80.+w – 190 ≤ A ≤ 219
© EPLA, 2015
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