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

Journal Article · Fri Jan 01 00:00:00 EST 2016 · Physics Letters. Section B

DOI:https://doi.org/10.1016/j.physletb.2015.11.056· OSTI ID:1392562

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.

A number of 3-quasiparticle isomers have been found and characterised in the odd-mass, neutron-rich, Re-187, Re-189 and Re-191 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 gamma values of 5 degrees, 18 degrees and 25 degrees deduced in the framework of a particle-rotor model. (C) 2015 Published by Elsevier B.V.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science - Office of Nuclear Physics
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1392562
• Journal Information: Physics Letters. Section B, Vol. 752; ISSN 0370-2693
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

neutron-rich
shape transition
triaxiality