APS » PROLA » Phys. Rev. Lett. » Volume 61 » Issue 18

Phys. Rev. Lett. 61, 2073 - 2076 (1988)

Evidence for a Low-Frequency πh9 / 2 Band Crossing in 185Pt and 183Ir
Download: Page Images , PDF (634 kB), or Buy this Article (Use Article Pack) Export: BibTeX or EndNote (RIS)

V. P. Janzen, M. P. Carpenter *, L. L. Riedinger, and W. Schmitz †
Department of Physics, University of Tennessee, Knoxville, Tennessee 37996-1200

S. Pilotte and S. Monaro
Université de Montréal, Montréal, Québec, Canada H3C 3J7

D. D. Rajnauth, J. K. Johansson, D. G. Popescu, and J. C. Waddington
Tandem Accelerator Laboratory, McMaster University, Hamilton, Ontario, Canada L8S 4K1

Y. S. Chen ‡, F. Dönau §, and P. B. Semmes **
Joint Institute for Heavy Ion Research, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830

Received 6 June 1988

Evidence is presented for a πh9 / 2 band crossing at surprisingly low rotational frequency in the odd-neutron 185Pt and odd-proton 183Ir nuclei. The proton nature of the crossing is indicated by measured B(M1;I→I-1) / B(E2;I→I-2) ratios, strongly supported by theoretical values from both the semi-classical Dönau and Frauendorf approach and a variable-core particle-rotor calculation employing cranked-shell-model matrix elements. However, the actual crossing frequency is greatly overestimated by the cranking method using generally accepted model parameters.


©1988 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v61/p2073
DOI: 10.1103/PhysRevLett.61.2073
PACS: 21.10.Re, 23.20.Js, 27.70.+q

* Present address: Niels Bohr Institute, Tandem Accelerator Laboratory, 4000 Roskilde, Denmark.
† Present address: ISKP Universität Bonn, Nussallee 5300 Bonn, West Germany.
‡ Permanent address: Institute of Atomic Physics, Beijing, China.
§ Permanent address: Zentralinstitut für Kernforschung Rossendorf, 8051 Dresden PSF.19, DDR.
** Present address: Tennessee Technological University, Cookeville, TN 38501.

[ Abstract  |  Previous article  |  Next article  |  Issue 18 ]