Low-lying collective quadrupole and octupole strengths in even-even nuclei

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.43.556· OSTI ID:5833877

Raman, S; Nestor, Jr, C W ^[1]; Kahane, S ^[2]; Bhatt, K H ^[3]

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1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (US)
2. Joint Institute for Heavy-Ion Research, Holifield Heavy Ion Research Facility, Oak Ridge, Tennessee 37831 (USA)
3. Department of Physics and Astronomy, University of Mississippi, University, Mississipi 38677 (USA)

The {ital B}({ital E}2){up arrow} values for the first 2{sup +} state of even-even nuclei in the {ital Z}{ge}50 region are compared with the predictions of several theoretical models. Comparative estimates of the overall agreement with the data are provided. Gaps and discrepancies in the data and examples that show interesting features such as shape changes are discussed. The {ital B}({ital E}2){up arrow} values are examined critically to search for the dynamical Pauli effects predicted by the fermion dynamic symmetry model. The empirical {ital B}({ital E}2){up arrow} and {ital B}({ital E}3){up arrow} systematics are employed to obtain a measure of the harmonicity of the quadrupole and octupole vibrations. The fraction of the energy-weighted sum-rule strength exhausted by the sum of all known low-lying 2{sup +} states below 2.3 MeV is found to be surprisingly constant in the 60{lt}{ital A}{lt}250 region except near closed shells.

• DOE Contract Number: AC05-84OR21400; AS05-76ER04936
• OSTI ID: 5833877
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 43:2; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653001* -- Nuclear Theory-- Nuclear Structure
Moments
Spin
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
COLLECTIVE MODEL
DEFORMATION
E2-TRANSITIONS
E3-TRANSITIONS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EQUATIONS
EVEN-EVEN NUCLEI
HYDRODYNAMIC MODEL
LIFETIME
MATHEMATICAL MODELS
MULTIPOLE TRANSITIONS
NUCLEAR DEFORMATION
NUCLEAR MODELS
NUCLEI
PARITY
PARTICLE MODELS
PARTICLE PROPERTIES
SHELL MODELS
SPIN
STATISTICAL MODELS
SUM RULES
THERMODYNAMIC MODEL