Naslov
Competing single-particle and collective structures in 86Nb

Autori
Tabor, S.L. ; Doring, J. ; Johns, G.D. ; Kaye, R.A. ; Sylvan, G.N. ; Gross, C.J. ; Akovali, Y.A. ; Baktash, C. ; Stracener, D.W. ; Hua, P.F. ; Korolija, Milorad ; LaFosse, D.R. ; Sašantites, D.G. ; Durham, F.E. ; Lee, I.Y. ; Macchiavelli, A.O. ; Rathbun, W. ; Vander Mollen, A.

Izvornik
Physical review C : nuclear physics (0556-2813) 56 (1997), 1; 142-153

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
High-spin states; Odd-odd nucleus; Y-82; Signature; Br-76; Bands

Sažetak
The high-spin structure of odd-odd Nb-86 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 Ni-58(S-32, 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(-)). The yrast positive-parity band shares many characteristics with the pi g(9/2) x nu g(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(+) 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) over bar are candidates for fully or nearly fully aligned shell-model-like configurations.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA