NUCL 45 |
| The search for stable triaxial-deformed nuclei, rather than gamma-softness, has been ongoing for many years. Despite many experiments and much theoretical effort a unique signature for stable triaxial deformation has until very recently proved elusive. Recently, however, evidence has been found of the long predicted wobbling mode, which is a definitive signature of a stable triaxial nuclear shape. The experimental evidence consists of pairs of triaxial strongly deformed bands (TSD) in Lu isotopes (163, 165, and 167) which show many of the characteristics expected of the wobbling mode. These assignments are based on the properties of these bands, including the electromagnetic character, non-stretched E2 transitions with weak M1 admixtures of the inter-band linking transition. Conversion coefficients provide a sensitive test of the electromagnetic character of transitions. In this experiment Gammasphere and ICE Ball were used to measure internal coefficients for many transitions in 167Lu, including several in the TSD bands. Results will be presented and the prospects of measuring the conversion coefficients for the linking transitions discussed. This work is supported in part by the DOE under grant numbers DE-FG02-05ER41379 and DE-FG52-06NA26206. |
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Nuclear Structure and Reactions in the Era of Radioactive Beams
8:10 AM-12:00 PM, Monday, August 20, 2007 Boston Park Plaza -- Lexington Room, Oral
Division of Nuclear Chemistry & Technology |