Low energy Q-phonon excitations in nuclei

Journal Article · Thu Sep 02 04:00:00 EDT 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.59559· OSTI ID:20216649

Brentano, P von ^[1]; Pietralla, N ^[1]; Fransen, C ^[1]; Friessner, C ^[1]; Gade, A ^[1]; Gelberg, A ^[1]; Herzberg, R -D ^[1]; Kneissl, U ^[2]; Meise, H ^[1]; Otsuka, T ^[3]

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1. Institut fuer Kernphysik, Universitaet zu Koeln, 50937 Koeln, (Germany)
2. Institut fuer Strahlenphysik, Universitaet Stuttgart, 70569 Stuttgart, (Germany)
3. Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, (Japan)

One-, two-, and multi-Q-phonon excitations in heavy nuclei are discussed. We describe the Q-phonon scheme for low-lying, isoscalar, positive parity states in {gamma}-soft nuclei and compare the predictions of the Q-phonon scheme to new data on the nucleus {sup 132}Ce. We report on the experimental proof for the quadrupole-octupole coupled two-phonon nature of the lowest-lying 1{sup -} state in the semi-magic N=82 nuclei {sup 142}Nd and {sup 144}Sm. Finally, low-lying proton-neutron asymmetric mixed-symmetry states are discussed in terms of the Q-phonon scheme. We report on recent lifetime measurements of the mixed-symmetry one-Q-phonon excitation, the 2{sub ms}{sup +} state, in the nuclei {sup 125,128}Xe, {sup 136}Ba, and {sup 144}Nd. (c) 1999 American Institute of Physics.

• OSTI ID: 20216649
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 481; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARIUM 136
COINCIDENCE METHODS
COLLECTIVE EXCITATIONS
E2-TRANSITIONS
ENERGY LEVELS
EXPERIMENTAL DATA
M1-TRANSITIONS
NEODYMIUM 142
NEODYMIUM 144
PHONONS
THEORETICAL DATA
XENON 126
XENON 128