Impact of triaxiality on the rotational structure of neutron-rich rhenium isotopes

M. W. Reed; G. J. Lane; G. D. Dracoulis; F. G. Kondev; M. P. Carpenter; P. Chowdhury; S. S. Hota; R. O. Hughes; R. V.F. Janssens; T. Lauritsen; C. J. Lister; N. Palalani; D. Seweryniak; H. Watanabe; S. Zhu; W. G. Jiang; F. R. Xu

doi:10.1016/j.physletb.2015.11.056

Impact of triaxiality on the rotational structure of neutron-rich rhenium isotopes

M. W. Reed^*, G. J. Lane, G. D. Dracoulis, F. G. Kondev, M. P. Carpenter, P. Chowdhury, S. S. Hota, R. O. Hughes, R. V.F. Janssens, T. Lauritsen, C. J. Lister, N. Palalani, D. Seweryniak, H. Watanabe, S. Zhu, W. G. Jiang, F. R. Xu

^*Corresponding author for this work

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

12 Citations (Scopus)

Abstract

A number of 3-quasiparticle isomers have been found and characterised in the odd-mass, neutron-rich, ¹⁸⁷Re, ¹⁸⁹Re and ¹⁹¹Re nuclei, the latter being four neutrons beyond stability. The decay of the isomers populates states in the rotational bands built upon the 9/2^-[514] Nilsson orbital. These bands exhibit a degree of signature splitting that increases with neutron number. This splitting taken together with measurements of the M1/E2 mixing ratios and with the changes observed in the energy of the gamma-vibrational band coupled to the 9/2^-[514] state, suggests an increase in triaxiality, with γ values of 5°, 18° and 25° deduced in the framework of a particle-rotor model.

Original language	English
Pages (from-to)	311-316
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	752
DOIs	https://doi.org/10.1016/j.physletb.2015.11.056
Publication status	Published - 10 Jan 2016

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Reed, M. W., Lane, G. J., Dracoulis, G. D., Kondev, F. G., Carpenter, M. P., Chowdhury, P., Hota, S. S., Hughes, R. O., Janssens, R. V. F., Lauritsen, T., Lister, C. J., Palalani, N., Seweryniak, D., Watanabe, H., Zhu, S., Jiang, W. G., & Xu, F. R. (2016). Impact of triaxiality on the rotational structure of neutron-rich rhenium isotopes. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 752, 311-316. https://doi.org/10.1016/j.physletb.2015.11.056

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title = "Impact of triaxiality on the rotational structure of neutron-rich rhenium isotopes",

abstract = "A number of 3-quasiparticle isomers have been found and characterised in the odd-mass, neutron-rich, 187Re, 189Re and 191Re nuclei, the latter being four neutrons beyond stability. The decay of the isomers populates states in the rotational bands built upon the 9/2-[514] Nilsson orbital. These bands exhibit a degree of signature splitting that increases with neutron number. This splitting taken together with measurements of the M1/E2 mixing ratios and with the changes observed in the energy of the gamma-vibrational band coupled to the 9/2-[514] state, suggests an increase in triaxiality, with γ values of 5°, 18° and 25° deduced in the framework of a particle-rotor model.",

keywords = "Neutron-rich, Shape transition, Triaxiality, γ-Ray spectroscopy",

author = "Reed, {M. W.} and Lane, {G. J.} and Dracoulis, {G. D.} and Kondev, {F. G.} and Carpenter, {M. P.} and P. Chowdhury and Hota, {S. S.} and Hughes, {R. O.} and Janssens, {R. V.F.} and T. Lauritsen and Lister, {C. J.} and N. Palalani and D. Seweryniak and H. Watanabe and S. Zhu and Jiang, {W. G.} and Xu, {F. R.}",

note = "Publisher Copyright: {\textcopyright} 2015.",

year = "2016",

month = jan,

day = "10",

doi = "10.1016/j.physletb.2015.11.056",

language = "English",

volume = "752",

pages = "311--316",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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publisher = "Elsevier B.V.",

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Reed, MW, Lane, GJ, Dracoulis, GD, Kondev, FG, Carpenter, MP, Chowdhury, P, Hota, SS, Hughes, RO, Janssens, RVF, Lauritsen, T, Lister, CJ, Palalani, N, Seweryniak, D, Watanabe, H, Zhu, S, Jiang, WG & Xu, FR 2016, 'Impact of triaxiality on the rotational structure of neutron-rich rhenium isotopes', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 752, pp. 311-316. https://doi.org/10.1016/j.physletb.2015.11.056

TY - JOUR

T1 - Impact of triaxiality on the rotational structure of neutron-rich rhenium isotopes

AU - Reed, M. W.

AU - Lane, G. J.

AU - Dracoulis, G. D.

AU - Kondev, F. G.

AU - Carpenter, M. P.

AU - Chowdhury, P.

AU - Hota, S. S.

AU - Hughes, R. O.

AU - Janssens, R. V.F.

AU - Lauritsen, T.

AU - Lister, C. J.

AU - Palalani, N.

AU - Seweryniak, D.

AU - Watanabe, H.

AU - Zhu, S.

AU - Jiang, W. G.

AU - Xu, F. R.

PY - 2016/1/10

Y1 - 2016/1/10

N2 - A number of 3-quasiparticle isomers have been found and characterised in the odd-mass, neutron-rich, 187Re, 189Re and 191Re nuclei, the latter being four neutrons beyond stability. The decay of the isomers populates states in the rotational bands built upon the 9/2-[514] Nilsson orbital. These bands exhibit a degree of signature splitting that increases with neutron number. This splitting taken together with measurements of the M1/E2 mixing ratios and with the changes observed in the energy of the gamma-vibrational band coupled to the 9/2-[514] state, suggests an increase in triaxiality, with γ values of 5°, 18° and 25° deduced in the framework of a particle-rotor model.

AB - A number of 3-quasiparticle isomers have been found and characterised in the odd-mass, neutron-rich, 187Re, 189Re and 191Re nuclei, the latter being four neutrons beyond stability. The decay of the isomers populates states in the rotational bands built upon the 9/2-[514] Nilsson orbital. These bands exhibit a degree of signature splitting that increases with neutron number. This splitting taken together with measurements of the M1/E2 mixing ratios and with the changes observed in the energy of the gamma-vibrational band coupled to the 9/2-[514] state, suggests an increase in triaxiality, with γ values of 5°, 18° and 25° deduced in the framework of a particle-rotor model.

KW - Neutron-rich

KW - Shape transition

KW - Triaxiality

KW - γ-Ray spectroscopy

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U2 - 10.1016/j.physletb.2015.11.056

DO - 10.1016/j.physletb.2015.11.056

M3 - Article

SN - 0370-2693

VL - 752

SP - 311

EP - 316

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Impact of triaxiality on the rotational structure of neutron-rich rhenium isotopes

Abstract

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