2018 Impact factor 2.481
Hadrons and Nuclei
Eur. Phys. J. A 5, 143-150

The $\beta^+$-electron capture decay of 73Kr

Ch. Miehé1 - Ph. Dessagne1 - Ch. Pujol1 - G. Walter1 - B. Jonson2 - M. Lindroos3 - The ISOLDE Collaboration$^{\rm 3}$

1 Institut de Recherches Subatomiques, UMR7500, CNRS-IN2P3 et Université Louis Pasteur, BP28, F-67037 Strasbourg Cedex 2, France
2 Chalmers University of Technology, Göteborg, Sweden
3 CERN, CH-1211 Geneva, Switzerland

Received: 17 September 1998 / Revised version: 25 January 1999 Communicated by J. Äysto

Abstract
The $\beta^+$ - electron capture decay of 73Kr, produced at the ISOLDE CERN facility, has been studied by $\beta$-delayed proton and gamma emission. The established decay scheme involves 15 up to now unreported gamma emitting levels in 73Br. The total proton branching ratio has been measured to be $0.0025 \pm 0.0003$. From this work, a spin and parity 3/2- is assigned to the 73Kr ground state, on the basis of the allowed $\beta$ branch to the 73Br $J^{\pi}=1/2^-$ ground state and the feeding of the 5/2+ level located at 286 keV in 73Br.

PACS
21.10.HwSpin, parity, and isobaric spin - 23.20.LvGamma transitions and level energies - 23.40.Hc Relation with nuclear matrix elements and nuclear structure - 27.50.+e $59 \leq A \leq 89 $


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