Structural characteristics of {sup {bold 142}}Ce through inelastic neutron scattering

Journal Article · Wed Nov 01 04:00:00 EST 1995 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.52.2387· OSTI ID:122373

Vanhoy, J R; Anthony, J M; Haas, B M; Benedict, B H; Meehan, B T ^[1]; Hicks, S F; Davoren, C M; Lundstedt, C L ^[2]

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1. Department of Physics, United States Naval Academy, Annapolis, Maryland 21402 (United States)
2. Department of Physics, University of Dallas, Irving, Texas 75062 (United States)

The excited levels of {sup 142}Ce have been studied using the ({ital n},{ital n}{sup {prime}}{gamma}) reaction. Excitation functions, angular distributions, and Doppler shifts were measured for {gamma} rays from levels up to an excitation energy of 3.3 MeV; multipole-mixing and branching ratios and transition rates were deduced. Theoretical predictions of electromagnetic transition rates were compared for the interacting boson model, the quasiparticle phonon model, and the particle-core coupling model with experimental values. Evidence is found supporting the fragmentation of mixed-symmetry strength among neighboring {sup 142}Ce excited levels. This fragmentation is evinced in the 2{sup +} excitations through strong {ital M}1 transitions; however, the 3{sup +} mixed-symmetry strength is not manifested directly through strong {ital M}1 transitions, but rather is implied through model calculations. Candidates for multiphonon excitations are identified for the three-quadrupole and quadrupole-octupole phonon quintets.

• OSTI ID: 122373
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 52; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANGULAR DISTRIBUTION
BRANCHING RATIO
CERIUM 142
DOPPLER EFFECT
EXCITATION FUNCTIONS
EXCITED STATES
FRAGMENTATION
INELASTIC SCATTERING
INTERACTING BOSON MODEL
M1-TRANSITIONS
MIXING
NEUTRON REACTIONS
QUASIPARTICLE-PHONON MODEL