2018 Impact factor 2.481
Hadrons and Nuclei


Eur. Phys. J. A 13, 449-460 (2002)
DOI: 10.1140/epja/iepja1111

Decay of the neutron-rich isotope $\chem{^{113}Ru}$ to $\chem{^{113}Rh}$

J. Kurpeta1, G. Lhersonneau2, A. Plochocki1, J.C. Wang2, P. Dendooven2, A. Honkanen2, M. Huhta2, M. Oinonen2, H. Penttilä2, K. Peräjärvi2, J.R. Persson2 and J. Äystö2, 3

1  Institute of Experimental Physics, Warsaw University, ul. Hoza 69, 00-681 Warszawa, Poland
2  Department of Physics, University of Jyväskylä, P.O. Box. 35, FIN-40351, Jyväskylä, Finland
3  EP-ISOLDE, CERN 23, CH-1211, Geneva, Switzerland

jkurpeta@mimuw.edu.pl

(Received: 18 January 2001 / Revised version: 29 November 2001 Communicated by C. Signorini)

Abstract
The decay of neutron-rich isotope 113Ru obtained as on-line mass separated product of proton-induced fission has been investigated by $\gamma\gamma$ coincidence and spectrum multiscaling measurements. Decay schemes for both low- and high-spin isomers of 113Ru have been constructed. The level scheme of 113Rh is considerably extended. Systematics of the lowest-lying rhodium levels is smooth. The picture of shape coexistence established for neutron-rich Rh isotopes near-neutron midshell is confirmed with the observation of a K=1/2 deformed band, with its 3/2 + state at 600 keV being the lowest-lying level and of probable 7/2 + and 5/2 + band members. A large fraction of $\beta$ feeding is found to populate high-lying levels in 113Rh. The GT strength in 113Ru $^{\rm m}$ decay is significantly larger than for the decay of 113Ru $_{\rm g}$ and of lighter rhodium isotopes.

PACS
27.60.+j - 90 $\leq A \leq$ 149.
23.20.Lv - Gamma transitions and level energies.

© Società Italiana di Fisica, Springer-Verlag 2002