Intruder structures observed in {sup 122}Te through inelastic neutron scattering

Journal Article · Tue Mar 01 04:00:00 EST 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.71.034307· OSTI ID:20695988

Hicks, S F; Alexander, G K; Aubin, C A; Burns, M C; Collard, C J; Walbran, M M; Vanhoy, J R; Jensen, E ^[1]; Garrett, P E; Martin, A; Warr, N ^[2]; Kadi, M ^[3]; Yates, S W ^[2]

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1. Department of Physics, University of Dallas, Irving, Texas 75062 (United States)
2. Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (United States)
3. Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506-0055 (United States)

The excited levels of {sup 122}Te to 3.3- MeV excitation have been studied using {gamma}-ray spectroscopy following inelastic neutron scattering. The decay characteristics of these levels have been determined from {gamma}-ray excitation functions, angular distributions at E{sub n}-1.72,2.80, and 3.35 MeV, Doppler shifts, and {gamma}{gamma} coincidences. Electromagnetic transition rates were deduced for many levels, as were multipole-mixing and branching ratios. Level energies and electromagnetic transition rates were compared to interacting boson model (IBM) calculations, both with and without intruder-state mixing, and to particle-core coupling model calculations. The energies of low-lying levels of {sup 122}Te are well described by the IBM with intruder-state mixing calculations, and observed transition rates support emerging intruder bands built on 0{sup +} levels. The other models considered do not produce enough low-lying positive parity states; however, U(5) energies to the four quadrupole-phonon level agree very well with observations when states with large intruder configurations are ignored. Mixed-symmetry and quadrupole-octupole excitations have been investigated, but mixing with other configurations and fragmentation of strength prohibit a clear identification of these states.

• OSTI ID: 20695988
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 71; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BRANCHING RATIO
DOPPLER EFFECT
EXCITATION
EXCITATION FUNCTIONS
EXCITED STATES
GAMMA SPECTRA
INELASTIC SCATTERING
INTERACTING BOSON MODEL
MEV RANGE
NEUTRON REACTIONS
NEUTRONS
NUCLEAR DECAY
OCTUPOLES
PARITY
PARTICLE-CORE COUPLING MODEL
PHONONS
QUADRUPOLES
SPIN
TELLURIUM 122