Abstract.
The very neutron-deficient 91,92,93Rh and 90,91Ru nuclei were produced in 58Ni(36,40Ar, xn yp) fusion-evaporation reactions. Reaction products leaving the target were stopped in a gas cell and selectively laser ionised before mass separation using the LISOL setup. Data were collected in singles and coincidence formats to investigate \(\beta\)-delayed and isomeric \(\gamma\) decays. Ground-state decays of 91,93 Rh to excited states in the daughter nucleus were identified for the first time and the decay schemes of 90,91 Ru were expanded. The low-spin isomeric decay of 92Rh was identified for the first time and detail added to the decay scheme of the known high-spin state. Results are discussed in terms of comparison with shell model calculations. \(\beta\)-delayed proton activity in the lighter 90Rh and 89Ru isotopes was also investigated and upper limits for this decay mode in these two nuclei have been included.
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Communicated by J. Äystö
Received: 26 November 2003, Revised: 12 January 2004, Published online: 10 August 2004
PACS:
23.40.-s \(\beta\) decay; double \(\beta\) decay; electron and muon capture - 21.10.-k Properties of nuclei; nuclear energy levels - 21.10.Tg Lifetimes - 21.60.Cs Shell model
M. Górska: Present address: Gesellschaft für Schwerionenforschung, Planckstrasse 1, D-64291 Darmstadt, Germany.
K. Van de Vel: Present address: VITO, IMS, Mol, Belgium.
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Dean, S., Górska, M., Aksouh, F. et al. The beta decay of neutron-deficient rhodium and ruthenium isotopes. Eur. Phys. J. A 21, 243–255 (2004). https://doi.org/10.1140/epja/i2003-10204-2
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DOI: https://doi.org/10.1140/epja/i2003-10204-2