Studies of very neutron-rich odd-mass nuclei with 109≤A≤119
The structure of the odd-A nuclei 109Ru, 111,113Rh, 111,113,115,117Pd, and 117,119Ag were investigated via the beta decay of their parent nuclei. The β-decays of 109Mo, 111Tc, 113Ru, 113,115,117Rh and 119Pd and isomeric decays of 113mPd and 117mPd were discovered. The X-, γ-, β- and conversion electron coincidence spectrocopies were performed on mass separated sources produced with the ion guide technique. The experimental systematics of both the normal and the intruder states were extended towards higher neutron excess. Results are compared with the predictions of deformed macroscopic-microscopic model. The coexistence of oblate and prolate shapes is suggested to explain the exceptional large hindrance in the decay of isomeric states in odd-A Pd nuclei. New β-decay half-lives are compared with the predictions of gross theory and QRPA calculations.
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