2018 Impact factor 2.481
Hadrons and Nuclei
Eur. Phys. J. A 2, 327-330

Short note

T-band phenomena in 183Re

N. Hashimoto1,2 - T.R. Saitoh2 - G. Sletten2 - R.A. Bark2 - M. Bergström2 - K. Furuno1 - T. Komatsubara1 - T. Shizuma1 - S. Törmänen2 - P.G. Varmette2

1 Department of Physics and Tandem Accelerator Center, University of Tsukuba, Ibaraki 305-8577, Japan
2 The Niels Bohr Institute, University of Copenhagen, Roskilde, Denmark

Received: 20 April 1998 Communicated by B. Herskind

Abstract
High-spin states in 183Re have been studied using the 176Yb(11B,4n) reaction at 52 and 57 MeV. Two high-K bands have been observed directly by a time-correlated $\gamma$-$\gamma$ coincidence measurement. One of the bands is built on an isomeric $K^\pi=\frac{25}{2}^+$ state at Ex = 1908 keV with a half-life of 0.82(2) ms. The other band, assigned as $K^\pi=\frac{29}{2}^-$ at Ex = 2739 keV, decays to the $\frac{25}{2}^+$ band. These bands are interpreted as three-quasiparticle structures, $\pi\frac{5}{2}^+[402]$ $\otimes$ $\nu\frac{9}{2}^+[624]$$\otimes$$\nu\frac{11}{2}^+[615]$ for the $\frac{25}{2}^+$ band and $\pi\frac{9}{2}^-[514]$$\otimes$$\nu\frac{9}{2}^+[624]$$\otimes$$\nu\frac{11}{2}^+[615]$ for the $\frac{29}{2}^-$ band. The $K^\pi=\frac{29}{2}^-$ band becomes strongly Coriolis mixed with increasing spin and is gradually changing into a low-K s-band structure.

PACS
21.10.Tg Lifetimes - 23.20.Lv Gamma transitions and level energies

Author for correspondance: nami@tac.tsukuba.ac.jp


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