2020 Impact factor 3.043
Hadrons and Nuclei
Eur. Phys. J. A 16, 359-363 (2003)
DOI: 10.1140/epja/i2002-10103-0

Mirror decay of $\chem{^{75}Sr}$

J. Huikari1, M. Oinonen2, 3, A. Algora4, J. Cederkäll3, S. Courtin5, P. Dessagne5, L. Fraile3, S. Franchoo3, H. Fynbo3, W.X. Huang1, A. Jokinen1, 2, 3, A. Knipper5, F. Marechal5, C. Miehé5, E. Nacher4, K. Peräjärvi3, E. Poirier5, L. Weissman3, J. Äystö1, 2, 3 and the ISOLDE Collaboration5

1  Department of Physics, University of Jyväskylä, P.O. Box 35, FIN-40351, Jyväskylä, Finland
2  Helsinki Institute of Physics, FIN-00014 University of Helsinki, Finland
3  CERN, CH-1211 Geneva 23, Switzerland
4  Instituto de Física Corpuscular, CSIC - University of Valencia, E-46071 Valencia, Spain
5  Institut de Recherches Subatomiques, F-67037 Strasbourg Cedex 2, France

jussi.huikari@phys.jyu.lfi

(Received: 26 September 2002 / Revised version: 24 October 2002 / Published online: 18 February 2003)

Abstract
The $\beta$-decay of $\chem{^{75}Sr}$ to its mirror nucleus $\chem{^{75}Rb}$ was studied at the ISOLDE PSB facility at CERN by means of $\beta$-delayed $\gamma$ and proton spectroscopy. The decay Q-value and $\beta$-delayed $\gamma$ intensity were measured for the first time. These results, $10.60\pm 0.22$ MeV and $4.5^{+1.9}_{-0.7}\%$, together with accurate measurements of the $\beta$-decay half-life and $\beta$-delayed proton branching ratio yielded the Gamow-Teller strength $0.35\pm 0.05$ for the mirror transition. Implications of the results on studies of deformation effects and on the path of the rapid proton capture process are discussed.

PACS
23.40.Hc - Relation with nuclear matrix elements and nuclear structure.
21.10.Tg - Lifetimes.
23.50.+z - Decay by proton emission.
27.50.+e - $59 \leq A \leq 89$ .

© Società Italiana di Fisica, Springer-Verlag 2003