"RECOIL DECAY TAGGING STUDIES OF 173Pt, 175Pt"
Pauli Peura, Department of Physics, University of Jyväskylä
(id #86)
Seminar: NoPoster: Yes
Invited talk: No
The very neutron deficient region near the Z = 82 proton shell closure has been actively studied for many years. Nuclei in this region are well known to exhibit characteristics typically associated with shape coexistence. Studying odd-mass nuclei sheds light on the single-quasiparticle orbitals present near the Fermi surface. Two nuclei, 173Pt and 175Pt, have not been studied extensively before mainly due to the difficulties with clean correlations in recoil decay tagging (RDT) measurements. Problems arise from many possible particle evaporation channels and alpha-decay branching ratios accompanied by long alpha-decay half-lives.
Two separate measurements have been performed at JYFL using a 86Sr beam to bombard thin self-supporting 92Mo targets. The first of these measurement was a RDT measurement, while the latter was a differential plunger life-time measurement.
In this work the previously observed yrast bands for 173Pt and 175Pt have been confirmed. For 175Pt additional non-yrast structures have been discovered and the 13/2+ band head of 173Pt was found to be isomeric. The ground state of these nuclei have shown evidence of alpha-decay fine structure.
Two separate measurements have been performed at JYFL using a 86Sr beam to bombard thin self-supporting 92Mo targets. The first of these measurement was a RDT measurement, while the latter was a differential plunger life-time measurement.
In this work the previously observed yrast bands for 173Pt and 175Pt have been confirmed. For 175Pt additional non-yrast structures have been discovered and the 13/2+ band head of 173Pt was found to be isomeric. The ground state of these nuclei have shown evidence of alpha-decay fine structure.
