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gamma-soft Ba-146 and the role of nonaxial shapes at N approximate to 90

Title: gamma-soft Ba-146 and the role of nonaxial shapes at N approximate to 90.
Name(s): Mitchell, A. J., author
Lister, C. J., author
McCutchan, E. A., author
Albers, M., author
Ayangeakaa, A. D., author
Bertone, P. F., author
Carpenter, M. P., author
Chiara, C. J., author
Chowdhury, P., author
Clark, J. A., author
Copp, P., author
David, H. M., author
Deo, A. Y., author
DiGiovine, B., author
D'Olympia, N., author
Dungan, R., author
Harding, R. D., author
Harker, J., author
Hota, S. S., author
Janssens, R. V. F., author
Kondev, F. G., author
Liu, S. H., author
Ramayya, A. V., author
Rissanen, J., author
Savard, G., author
Seweryniak, D., author
Shearman, R., author
Sonzogni, A. A., author
Tabor, S. L., author
Walters, W. B., author
Wang, E., author
Zhu, S., author
Type of Resource: text
Genre: Text
Date Issued: 2016-01-12
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: Low-spin states in the neutron-rich, N = 90 nuclide Ba-146 were populated following beta decay of Cs-146, with the goal of clarifying the development of deformation in barium isotopes through delineation of their nonyrast structures. Fission fragments of Cs-146 were extracted from a 1.7-Ci Cf-252 source and mass selected using the CAlifornium Rare Ion Breeder Upgrade (CARIBU) facility. Low-energy ions were deposited at the center of a box of thin beta detectors, surrounded by a highly efficient high-purity Ge array. The new Ba-146 decay scheme now contains 31 excited levels extending up to similar to 2.5 MeV excitation energy, double what was previously known. These data are compared to predictions from the interacting boson approximation (IBA) model. It appears that the abrupt shape change found at N = 90 in Sm and Gd is much more gradual in Ba and Ce, due to an enhanced role of the gamma degree of freedom.
Identifier: FSU_libsubv1_wos_000367895600001 (IID), 10.1103/PhysRevC.93.014306 (DOI)
Keywords: atomic-nuclei, ba, critical-point, interacting-boson model, neutron-rich, nuclear-data sheets, octupole deformation, region, rich barium isotopes, scheme
Publication Note: The publisher’s version of record is available at
Persistent Link to This Record:
Host Institution: FSU
Is Part Of: Physical Review C.
Issue: iss. 1, vol. 93

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Mitchell, A. J., Lister, C. J., McCutchan, E. A., Albers, M., Ayangeakaa, A. D., Bertone, P. F., … Zhu, S. (2016). gamma-soft Ba-146 and the role of nonaxial shapes at N approximate to 90. Physical Review C. Retrieved from