Neutron-Rich Nuclei Beyond {sup 132}Sn: Spherical Shapes and Octupole Correlations
- Department of Physics and Astronomy, Vanderbilt University, Nashville, TN (United States)
- Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
- Dipartimento di Scienze Fisiche, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Napoli (Italy)
- Istituto Nazionale di Fisica Nucleare, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Napoli (Italy)
- Department of Physics, Oxford University, Oxford OX1 3PU (United Kingdom)
- Flerov Laboratory of Nuclear Reactions, JINR, Dubna (Russian Federation)
- Department of Physics, Tsinghua University, Beijing 100084 (China)
Nuclear properties of nuclei with a few valence nucleons outside the doubly-magic {sup 132}Sn core and located in the octupole correlation region have been investigated via gamma-gamma-gamma coincidence measurements of prompt gamma-ray emitted in the spontaneous fission of {sup 252}Cf with Gammasphere. The high spin level scheme of {sup 134}I has been identified for the first time. Shell model calculations reproduce the level scheme quite well. The level schemes of {sup 137}I and {sup 139}Cs have been reinvestigated and extended. Their nuclear structure is well described by realistic shell model calculations. The g-factors of the 4{sup +} state in {sup 134}Te, 15/2{sup +} state in {sup 135}I, and 15/2{sup -} state in {sup 137}Xe were determined using a newly developed program for angular correlation analysis. The measured g-factors compared favorably with shell model calculations. Octupole correlations are proposed in {sup 141}Cs and {sup 142}Cs. The variations of D{sub 0} in the Cs isotopes exhibit a pronounced drop of dipole moment with increasing neutron number.
- OSTI ID:
- 21367220
- Journal Information:
- AIP Conference Proceedings, Vol. 1224, Issue 1; Conference: International symposium on exotic nuclei, Sochi (Russian Federation), 28 Sep - 2 Oct 2009; Other Information: DOI: 10.1063/1.3431475; (c) 2010 American Institute of Physics; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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