K-mixing in the doubly mid-shell nuclide 170Dy and the role of vibrational degeneracy
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Söderström, P-A, Walker, Philip, Wu, J, Liu, HL, Regan, Patrick, Watanabe, H, Doornenbal, P, Korkulu, Z, Lee, P, Liu, JJ , Lorusso, G, Nishimura, S, Phong, VH, Sumikama, T, Xu, FR, Lalkovski, S, Lotay, Gavin, Patel, Z, Podolyak, Zsolt and Shand, Callum (2016) K-mixing in the doubly mid-shell nuclide 170Dy and the role of vibrational degeneracy Physics Letters B, 762. pp. 404-408.
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Abstract
A detailed study of the structure of the doubly mid-shell nucleus View the MathML source has been carried out, following isomeric and β decay. We have measured the yrast band up to the spin-parity Jπ=6+ state, the K=2γ -vibration band up to the 5+ state, a low-lying negative-parity band based on a 2− state that could be a candidate for the lowest energy octupole vibration state within this nucleus, and a candidate for the Kπ=6+ two quasi-particle isomer. This state was determined to have an excitation energy of 1643.91(23) keV and a half life of 0.99(4) μs, with a reduced hindrance for its decay to the ground-state band an order of magnitude lower than predicted by NpNn systematics. This is interpreted as being due to γ -vibrational mixing from a near degeneracy of the isomer and the 6+ state of the γ band. Furthermore, the parent nucleus 170Tb has been determined to have a half-life of View the MathML source s with a possible spin-parity of 2−.
| Item Type: | Article | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Subjects : | Physics | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Divisions : | Faculty of Engineering and Physical Sciences > Physics | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Authors : |
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| Date : | 4 October 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| DOI : | 10.1016/j.physletb.2016.09.058 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Copyright Disclaimer : | © 2016 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Uncontrolled Keywords : | K isomer; Dysprosium; Mid-shell; γ-Ray spectroscopy | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Depositing User : | Symplectic Elements | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Date Deposited : | 24 Feb 2017 15:11 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Last Modified : | 16 Jan 2019 17:12 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| URI: | http://epubs.surrey.ac.uk/id/eprint/813635 |
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