High spin structure of the neutron-rich nuclei {sup 137}I and {sup 139}Cs

Journal Article · Thu Oct 15 04:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.044314· OSTI ID:21293927

Liu, S H; Hamilton, J H; Ramayya, A V; Hwang, J K ^[1]; Covello, A; Itaco, N ^[2]; Gargano, A ^[3]; Luo, Y X ^[1]; Rasmussen, J O ^[4]; Daniel, A V ^[1]; Ter-Akopian, G M ^[5]; Zhu, S J ^[6]; Ma, W C ^[7]

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1. Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235 (United States)
2. Dipartimento di Scienze Fisiche, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Napoli (Italy)
3. Istituto Nazionale di Fisica Nucleare, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Napoli (Italy)
4. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
5. Flerov Laboratory of Nuclear Reactions, JINR, Dubna (Russian Federation)
6. Department of Physics, Tsinghua University, Beijing 100084 (China)
7. Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762 (United States)

High spin excited states in the neutron-rich nuclei {sup 137}I and {sup 139}Cs were investigated from a study of the prompt {gamma} rays emitted in the spontaneous fission of {sup 252}Cf with the Gammasphere detector array. Ten new excited levels with 18 new deexciting transitions were observed in {sup 139}Cs and the level scheme of {sup 139}Cs was extended up to 4670 keV. Spins and parities of levels in {sup 139}Cs were firmly assigned up to 25/2{sup +}. Three new levels were found in {sup 137}I. Shell model calculations were performed to interpret the experimental results. A good agreement between theory and experiment in both nuclei was found.

• OSTI ID: 21293927
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALIFORNIUM 252
CESIUM 139
EXCITED STATES
GAMMA RADIATION
HIGH SPIN STATES
IODINE 137
KEV RANGE
MASS NUMBER
NEUTRON-RICH ISOTOPES
PARITY
SHELL MODELS
SPIN
SPONTANEOUS FISSION