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Title: Low energy Q-phonon excitations in nuclei

Abstract

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.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [3];  [1];  [4]
  1. Institut fuer Kernphysik, Universitaet zu Koeln, 50937 Koeln, (Germany)
  2. (United Kingdom)
  3. Institut fuer Strahlenphysik, Universitaet Stuttgart, 70569 Stuttgart, (Germany)
  4. Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, (Japan) (and others)
Publication Date:
OSTI Identifier:
20216649
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 481; Journal Issue: 1; Other Information: PBD: 2 Sep 1999; Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; XENON 126; BARIUM 136; NEODYMIUM 142; M1-TRANSITIONS; XENON 128; COLLECTIVE EXCITATIONS; PHONONS; COINCIDENCE METHODS; ENERGY LEVELS; E2-TRANSITIONS; NEODYMIUM 144; EXPERIMENTAL DATA; THEORETICAL DATA

Citation Formats

Brentano, P. von, Pietralla, N., Fransen, C., Friessner, C., Gade, A., Gelberg, A., Herzberg, R.-D., Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE,, Kneissl, U., Meise, H., and Otsuka, T. Low energy Q-phonon excitations in nuclei. United States: N. p., 1999. Web. doi:10.1063/1.59559.
Brentano, P. von, Pietralla, N., Fransen, C., Friessner, C., Gade, A., Gelberg, A., Herzberg, R.-D., Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE,, Kneissl, U., Meise, H., & Otsuka, T. Low energy Q-phonon excitations in nuclei. United States. doi:10.1063/1.59559.
Brentano, P. von, Pietralla, N., Fransen, C., Friessner, C., Gade, A., Gelberg, A., Herzberg, R.-D., Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE,, Kneissl, U., Meise, H., and Otsuka, T. Thu . "Low energy Q-phonon excitations in nuclei". United States. doi:10.1063/1.59559.
@article{osti_20216649,
title = {Low energy Q-phonon excitations in nuclei},
author = {Brentano, P. von and Pietralla, N. and Fransen, C. and Friessner, C. and Gade, A. and Gelberg, A. and Herzberg, R.-D. and Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, and Kneissl, U. and Meise, H. and Otsuka, T.},
abstractNote = {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.},
doi = {10.1063/1.59559},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 481,
place = {United States},
year = {1999},
month = {9}
}