Very extended shapes in 108Cd: evidence for the occupation of 'hyper-intruder' orbitals

Conference · Mon Jul 01 04:00:00 EDT 2002

OSTI ID:809316

Gorgen, A ^[1]; Clark, R M; Fallon, P; Cromaz, M; Deleplanque, M A; Diamond, R M; Lane, G J; Lee, I Y; Macchiavelli, A O; Ramos, R G; Stephens, F S; Svensson, C E; Vetter, K; Ward, D; Carpenter, M P; Janssens, R V.F.; Wadsworth, R

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1. LBNL Library

High-spin states in {sup 108}Cd were studied following the reaction {sup 64} Ni({sup 48}Ca,4n) at a beam energy of 207 MeV. Gamma rays were detected using the Gammasphere array. Two rotational bands have been observed at very high angular momentum. Measurements of fractional Doppler shifts yielded lower limits for the quadrupole moments and showed that the observed structures are at least as deformed as the superdeformed structures e.g. in the A {approx} 150 region, and possibly exceed a 2:1 axis ratio. The existence of very extended shapes has been predicted by cranked Strutinsky calculations, and recent projected shell model calculations suggest that the {pi}i{sub 13/2}hyper-intruder orbital is occupied in these newly observed bands.

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: Office of Science. Nuclear Physics (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 809316
• Report Number(s): LBNL--52315; B& R KB0401024
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
NUCLEAR STRUCTURE
OCCUPATIONS
QUADRUPOLE MOMENTS
ROTATIONAL STATES
SHELL MODELS