Eur. Phys. J. A (2007) 33: 307-316
https://doi.org/10.1140/epja/i2006-10464-2

Regular Article - Experimental Physics

Low-spin structure of ¹¹³Ru and ¹¹³Rh

¹ Faculty of Physics, University of Warsaw, ul.Hoża 69, 00-681, Warsaw, Poland
² Institute of Physics, Maria Curie-Skłodowska University, Pl. M. Curie-Skłodowskiej 1, 20-031, Lublin, Poland
³ NSCL/Cyclotron Laboratory, Michigan State University, 164 S. Shaw Lane, 48824-1321, East Lansing, MI, USA
⁴ Department of Physics, University of Jyväskylä, P.O.Box. 35, FIN-40351, Jyväskylä, Finland
⁵ Schuster Laboratory, Department of Physics and Astronomy, University of Manchester, M13 9PL, Manchester, UK
⁶ INFN, Laboratori Nazionali di Legnaro, Viale dell'Università 2, 35020, Legnaro, Italy
⁷ Argonne National Laboratory, 60439, Argonne, IL, USA

^* e-mail: jkurpeta@mimuw.edu.pl

Received: 30 December 2006
Accepted: 27 August 2007
Published online: 14 September 2007

Abstract

The ¹¹³Ru and ¹¹³Rh nuclei, produced in the spontaneous fission of ²⁴⁸Cm and in proton-induced fission of ²³⁸U , were studied by means of prompt gamma spectroscopy using the EUROGAM 2 array of Anti-Compton spectrometers and the IGISOL mass separator, respectively. For the 0.5s isomer, found in ¹¹³Ru in our recent study we propose the 7/2^-[523] configuration. The present data indicate spin and parity 1/2⁺ for the ground state in ¹¹³Ru . This and some new data on the excited levels in ¹¹³Rh allows reinterpretation and a better understanding of the β^- _{} decay scheme of ¹¹³Ru . The properties of ¹¹³Ru were studied in the frame of the Core-Quasiparticle Coupling model, which has well reproduced the experimental data.