Band crossings in 170Os

G. D. Dracoulis; R. A. Bark; A. E. Stuchbery; A. P. Byrne; A. M. Baxter; F. Riess

doi:10.1016/0375-9474(88)90244-8

Band crossings in ¹⁷⁰Os

G. D. Dracoulis^*, R. A. Bark, A. E. Stuchbery, A. P. Byrne, A. M. Baxter, F. Riess

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

69 Citations (Scopus)

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.

Original language	English
Pages (from-to)	414-428
Number of pages	15
Journal	Nuclear Physics, Section A
Volume	486
Issue number	2
DOIs	https://doi.org/10.1016/0375-9474(88)90244-8
Publication status	Published - Sept 1988

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title = "Band crossings in 170Os",

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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AU - Dracoulis, G. D.

AU - Bark, R. A.

AU - Stuchbery, A. E.

AU - Byrne, A. P.

AU - Baxter, A. M.

AU - Riess, F.

PY - 1988/9

Y1 - 1988/9

N2 - 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.

AB - 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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VL - 486

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JO - Nuclear Physics, Section A

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ER -

Band crossings in ¹⁷⁰Os

Abstract

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