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

14 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

Access to Document

10.1016/j.physletb.2015.11.056

Cite this

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

@article{93cc31e394f642eab8583bfe991f22f9,

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",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

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

UR - https://www.scopus.com/pages/publications/84949034719

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

Access to Document

Other files and links

Fingerprint

Cite this