Open AccessImpact of triaxiality on the rotational structure of neutron-rich rhenium isotopes
Author(s) -
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,
Wen G. Jiang,
F. R. Xu
Publication year - 2015
Publication title -
physics letters b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.093
H-Index - 283
eISSN - 1873-2445
pISSN - 0370-2693
DOI - 10.1016/j.physletb.2015.11.056
Subject(s) - physics , neutron , atomic physics , isotope , rhenium , neutron number , nuclear physics , quasiparticle , neutron temperature , neutron cross section , condensed matter physics , superconductivity , inorganic chemistry , chemistry
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
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