NEW OBLATE BAND IN HG-196 WITH QUENCHED M1 STRENGTH

NR 2015
High-spin states in the nucleUs Hg-196 were populated in the reaction (Os(Be,5n))-Os-192 at a beam energy of 65 MeV. A regular rotational-like DELTAI = 1 band has been observed up to an excitation energy of E* almost-equal-to 8.7 MeV and spin I almost-equal-to 30hBAR. This is the second observation of a band of this character in a mercury isotope. The experimental results are compared with mean field calculations and semiclassical estimates based on the Donau-Frauendorf formalism. The mercury bands show significantly lower B(M1)/B(E2) branching ratios as compared with similar bands in light lead nuclei. This difference may be more readily explained by a difference in single-particle structure rather than by large differences in deformation between the lead and mercury configurations.

By the author/editor: Cederwall, Bo; DELEPLANQUE, MA; AZAIEZ, F; DIAMOND, RM; FALLON, P; KORTEN, W; show more...; LEE, IY; MACCHIAVELLI, AO; OLIVEIRA, JRB; STEPHENS, FS; KELLY, WH; VO, DT; BECKER, JA; BRINKMAN, MJ; HENRY, EA; HUGHES, JR; KUHNERT, A; STOYER, MA; WANG, TF; DRAPER, JE; DUYAR, C; RUBEL, E; DEBOER, J; show less...

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NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Subatomic Physic ...

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