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Quasiparticle alignments and alpha-decay fine structure of Pt-175
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2014 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 89, no 2, 024316- p.Article in journal (Refereed) Published
Abstract [en]

Excited states and decay properties of Pt-175 have been investigated using the Mo-92(Sr-86, 2pn) fusion-evaporation reaction. The JUROGAM I gamma-ray spectrometer and the GREAT spectrometer were used in conjunction with the gas-filled recoil separator RITU for the measurement of the radiation at the target and focal plane positions, respectively. Two new band structures, assigned to be based on the I-pi = (7/2(-)) ground state in Pt-175, have been established and the known yrast band has been extended up to I-pi = (49/2(+)). Rotational properties of the excited states in Pt-175 have been investigated within the cranked shell-model formalism. The low-frequency changes in the alignments of the positive-and negative-parity bands are interpreted as a sign of proton-pair excitations in the rotating core. Furthermore, the alpha-decay measurements reveal a candidate for a fourth alpha-decay branch in Pt-175, feeding a non-yrast state in Os-171.

Place, publisher, year, edition, pages
2014. Vol. 89, no 2, 024316- p.
Keyword [en]
Deficient Platinum Isotopes, Coincidence Data Sets, Nuclear-Data Sheets, Total Data Readout, Shape Coexistence, Neutron-Deficient, High-Spin, Barrier Penetrabilities, Quadrupole-Moments, Even-Even
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-147072DOI: 10.1103/PhysRevC.89.024316ISI: 000336083300006ScopusID: 2-s2.0-84897786966OAI: diva2:728976

QC 20140625

Available from: 2014-06-25 Created: 2014-06-23 Last updated: 2014-06-25Bibliographically approved

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Bäck, TorbjörnCederwall, Bo
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