Elsevier

Nuclear Physics A

Volume 486, Issue 2, 12 September 1988, Pages 414-428
Nuclear Physics A

Band crossings in 170Os

https://doi.org/10.1016/0375-9474(88)90244-8Get rights and content

Abstract

Excited states in the neutron-deficient nucleus 170Os were identified up to spin (24+) in the yrast band and to spin (23) in the lowest negative-parity band. Deformation systematics implied by the 2+ state energies for the very light osmium isotopes are compared with theory. Band-crossing frequencies, alignments and alignment gains are compared with cranked shell-model calculations. Deformation changes are required to obtain detailed agreement. A three-band mixing approach is invoked to explain the low-spin yrast anomaly in 172Os and to reproduce the yrast band in 170Os. The excitation energy of the postulated “intruder” band in 170Os and 172Os is deduced.

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    1

    Present Address: Institut fur Strahlen-und Kernphysik der Universitat Bonn, Nussallee 14–16, D-5300 Bonn 1 Germany.

    2

    Permanent address: Department of Physics and Theoretical Physics, Faculty of Science, Australian National University.

    3

    Permanent address: Sektion Physik, LMU, Universität München, Am Coulombwall 1 D-8046 Germany.

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