Band crossings in 170Os |
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| Institution: | 1. Akhiezer Institute for Theoretical Physics, National Science Center “Kharkiv Institute of Physics and Technology”, Kharkiv 61108, Ukraine;2. V.N. Karazin Kharkiv National University, Kharkiv 61022, Ukraine;1. Joint Institute for Nuclear Research, 141980 Dubna, Russia;2. “Babeş-Bolyai” University, Faculty of Physics, 400084 Cluj-Napoca, Romania;3. Mathematical Physics Department, Tomsk Polytechnic University, 634050 Tomsk, Russia;1. Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia;2. Center of Theoretical and Computational Physics, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia;3. Amity Institute of Nuclear Science and Technology, Amity University UP, 201313 Noida, India |
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| 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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