Quasiparticle alignments and alpha-decay fine structure of Pt-175

P. Peura, C. Scholey, D.T. Joss, S. Juutinen, R. Julin, T. Back, B. Cederwall, P.T. Greenlees, U. Jakobsson, P. Jones, D. S. Judson, S. Ketelhut, M. Labiche, M. Leino, M. Nyman, D. O'Donnell, R.D. Page, P. Rahkila, P. Ruotsalainen, M. SandzeliusP.J. Sapple, J. Saren, J. Simpson, J. Thomson, J. Uusitalo, H.V. Watkins

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3 Citations (Scopus)

Abstract

Excited states and decay properties of 175Pt have been investigated using the 92Mo(86Sr,2pn) fusion-evaporation reaction. The JUROGAM I γ-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 Iπ=(7/2−) ground state in 175Pt, have been established and the known yrast band has been extended up to Iπ=(49/2+). Rotational properties of the excited states in 175Pt 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 α-decay measurements reveal a candidate for a fourth
α-decay branch in 175Pt, feeding a non-yrast state in 171Os.
Original languageEnglish
Article number024316
Number of pages12
JournalPhysical Review C
Volume89
Issue number2
DOIs
Publication statusPublished - 24 Feb 2014
Externally publishedYes

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