Shape effects in h/sub 11/2/ and g/sub 7/2/ bands in /sup 159/Tm

Journal Article · Tue May 01 04:00:00 EDT 1984 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.29.1934· OSTI ID:7095983

Larabee, A J; Courtney, L H; Frauendorf, S; Riedinger, L L; Waddington, J C; Fewell, M P; Johnson, N R; Lee, I Y; McGowan, F K

The (7/2)(523) and (7/2)(404) bands are observed in /sup 159/Tm to I = (61/2) and (43/2), respectively, well beyond the i/sub 13/2/ neutron backbend. Before the backbend, the (7/2)(523) band exhibits large signature splitting, the (7/2)(404) none, which is interpreted as resulting from the very different driving influences of the K = (7/2) h/sub 11/2/, and g/sub 7/2/ orbits, respectively, on the core triaxiality. The i/sub 13/2/ neutron alignment changes the signature splitting in each band as a result of its dominant driving force to positive values of ..gamma... Measured B(M1;I..-->..I-1)/B(E2;I..-->..I-2) values increase dramatically after the backbend, and this is explained in terms of calculated increases in the M1 transition rates and decreases in the E2 rates.

• Research Organization: Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996-1200
• OSTI ID: 7095983
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 29:5; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651823* -- Nuclear Properties & Reactions
A=150-189
Experimental-- Energy Levels & Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BACKBENDING
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
NUCLEAR STRUCTURE
NUCLEI
ODD-EVEN NUCLEI
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
THULIUM 159
THULIUM ISOTOPES