2023 Impact factor 2.6
Hadrons and Nuclei
Eur. Phys. J. A 5, 151-156

Beta decay of 61Ga

M. Oinonen1 - P. Baumann2 - P. Dendooven1 - Y. Fujita3 - M. Górska4 - H. Grawe4 - Z. Hu4 - Z. Janas5 - A. Jokinen1 - R. Kirchner4 - O. Klepper4 - A. Knipper2 - W. Liu4 - H. Penttilä1 - A. Plochocki5 - M. Ramdhane2 - E. Roeckl4 - G. Walter2 - J. Äystö1

1 Department of Physics, University of Jyväskylä, P.O. Box 35, FIN-40351, Jyväskylä, Finland
2 Institut de Recherches Subatomiques, F-67037 Strasbourg, France
3 Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
4 Gesellschaft für Schwerionenforschung, Postfach 110552, D-64220 Darmstadt, Germany
5 Institute of Experimental Physics, Warsaw University, PL-00681 Warsaw, Poland

Received: 28 April 1998 / Revised version: 6 October 1998 Communicated by D. Guerreau

The $\beta$ decay of 61Ga to its mirror nucleus 61Zn has been measured for the first time by using on-line mass separation and $\beta$-delayed gamma-ray spectroscopy. The observed decay strength to the ground state implies superallowed character in accordance with the systematics of the mirror decays in the sd and fp shell. The $\beta$ feedings observed to four excited states in 61Zn are consistent with earlier spin-parity assignments based on in-beam experiments. The ground-state spin and parity for 61Ga were determined to be 3/2-.

21.10.Hw Spin, parity, and isobaric spin - 23.40.Hc Relation with nuclear matrix elements and nuclear structure - 27.50.+e $59 \le A \le 89$

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