Change of deformation at the backbending in the yrast superdeformed band of {sup 144}Gd
Conference
·
OSTI ID:458897
- dell`Universita, Padova (Italy)
A mean lifetime measurement using the Doppler shift attenuation method has been performed at GASP in order to extract the quadrupole moment of the yrast SD band of {sup 144}Gd. The extracted intrinsic quadrupole moments, being Q{sub 0}=13.7 eb above the backbending and Q{sub 0}=11.8 eb below the backbending, are consistent with a change of deformation from {beta}{sub 2}=0.51 (at {beta}{sub 4} {approx} 0.050) to {beta}{sub 2}=0.45 (at {beta}{sub 4} {approx}0.035). The experimental results are in nice agreement with the theoretical predictions, which revealed that the second well in {sup 144}Gd arises essentially from the very favored shell structure at N=80 and Z=64. The occupation at higher frequency of the aligned N=6 proton orbitals drives the nucleus to a slightly more deformed shape.
- Research Organization:
- Argonne National Lab., IL (United States)
- OSTI ID:
- 458897
- Report Number(s):
- ANL/PHY--97/1; CONF-9607156--; ON: DE97003376
- Country of Publication:
- United States
- Language:
- English
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