Competing single-particle and collective structures in86Nb
| Autor: | A. M. Vander Molen, F. E. Durham, J. Döring, D. R. LaFosse, G. N. Sylvan, D. W. Stracener, A. O. Macchiavelli, R. A. Kaye, I. Y. Lee, D. G. Sarantites, M. Korolija, G. D. Johns, Y. A. Akovali, P. F. Hua, W. Rathbun, C. Baktash, S. L. Tabor, C. J. Gross |
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| Rok vydání: | 1997 |
| Předmět: | |
| Zdroj: | Physical Review C. 56:142-153 |
| ISSN: | 1089-490X 0556-2813 |
| Popis: | The high-spin structure of odd-odd {sup 86}Nb was studied with the early implementation of GAMMASPHERE using 36 Compton-suppressed Ge detectors and the MICROBALL, a 95-element full-sphere charged-particle detector array. High-spin states were populated using the {sup 58}Ni({sup 32}S,3pn) reaction at 135 MeV with beams from the 88-Inch Cyclotron at Lawrence Berkeley National Laboratory. A number of bands were observed up to spins as high as (31{sup {minus}}). The yrast positive-parity band shares many characteristics with the {pi}g{sub 9/2}{circle_times}{nu}g{sub 9/2} bands in other odd-odd f-p-g shell nuclei. These similarities include the behavior of the moments of inertia, the magnitude and phase of the signature splitting and its phase reversal near the 10{sup +} state, and the strong alternations in the B(M1)/B(E2) strengths. The moments of inertia in the lowest pair of negative-parity bands start out with a sharp upbend and then gradually fall back to the rigid-body value. New positive- and negative-parity bands appear in the quasiparticle alignment region and eventually become yrast. Some additional positive-parity states around spin 17{h_bar} are candidates for fully or nearly fully aligned shell-model-like configurations. {copyright} {ital 1997} {ital The American Physical Society} |
| Databáze: | OpenAIRE |
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