Extended investigation of superdeformed bands in {sup 151,152}Tb nuclei

• Published in: Physical review. C, Nuclear physics Nuclear physics, 2008-01, Vol.77 (1)
• Main Authors: Robin, J., Byrski, Th, Duchene, G., Beck, F. A., Curien, D., Dubray, N., Dudek, J., Courtin, S., Dorvaux, O., France, G. de, Gall, B., Joshi, P., Nourredine, A., Pachoud, E., Piqueras, I., Vivien, J. P., Gozdz, A., Odahara, A., Nishinippon Institute of Technology, Kanda, Fukuoka 800-03, Schunck, N., Department of Physics, University of Surrey, GU2 7XH Guildford, Surrey, Adimi, N.
• Format: Article
• Language: English
• Subjects: ENERGY-LEVEL TRANSITIONS; GAMMA RADIATION; GAMMA SPECTRA; HIGH SPIN STATES; MEAN-FIELD THEORY; NUCLEAR DEFORMATION; NUCLEAR PHYSICS AND RADIATION PHYSICS; NUCLEAR STRUCTURE; QUANTUM FIELD THEORY; ROTATIONAL STATES; SPIN; STATISTICS; SUPERDEFORMED NUCLEI; TERBIUM 151; TERBIUM 152
• ISSN: 0556-2813; 1089-490X
• DOI: 10.1103/PHYSREVC.77.014308

A detailed study of known and new SD bands in Tb isotopes has been performed with the use of the EUROBALL IV {gamma}-ray array. The high-statistics data set has allowed for the extension of known SD bands at low and high spins by new {gamma}-ray transitions. These transitions, as it turns out, correspond to the rotational frequencies where the principal superdeformed gaps (Z=66,N=86) close giving rise to up- or down-bending mechanisms. This enables to attribute the underlying theoretical configurations with much higher confidence as compared to the previous identifications. Five new SD bands have been discovered, three of them assigned to the {sup 152}Tb and the two others to the {sup 151}Tb nuclei. Nuclear mean-field calculations have been used to interpret the structure of known SD bands as well as of the new ones in terms of nucleonic configurations.