Band structures in {sup 129}Cs

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

DOI:https://doi.org/10.1103/PHYSREVC.79.044317· OSTI ID:21286876

Sihotra, S ^[1]; Singh, K ^[1]; Malik, S S ^[2]; Goswamy, J; Mehta, D; Singh, N ^[1]; Palit, R; Naik, Z ^[3]; Kumar, R; Singh, R P; Muralithar, S ^[4]

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1. Department of Physics, Panjab University, Chandigarh 160014 (India)
2. Department of Physics, Guru Nanak Dev University, Amritsar 143005 (India)
3. Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai 400005 (India)
4. Inter-University Accelerator Centre, New Delhi 110067 (India)

The {sup 122}Sn({sup 11}B,4n) fusion-evaporation reaction at E{sub lab}=60 MeV was used to populate excited states in {sup 129}Cs, and the deexcitations were investigated using in-beam {gamma}-ray spectroscopic techniques. The level scheme of {sup 129}Cs is established up to {approx}8 MeV excitation energy and 47/2 h spin. The observed band structures are interpreted for their configurations in the framework of cranking model calculations and systematic of the neighboring {sub 55}Cs isotopes. A negative-parity {delta}I=1 coupled band has been assigned the {pi}h{sub 11/2} x {nu}(h{sub 11/2}){sup 2} configuration as solution of the tilted-axis cranking, which coexists with the {pi}h{sub 11/2} yrast band resulting from the principal-axis cranking. A new band has been identified as a {gamma}-vibrational band built on the {pi}h{sub 11/2} orbital. A pair of strongly coupled positive-parity bands exhibiting similar features have been assigned different unpaired three-quasiparticle configurations involving the {pi}h{sub 11/2} x {nu}h{sub 11/2} component. The previously identified unfavored signature partners of the {pi}d{sub 5/2} and {pi}g{sub 7/2} bands are reassigned as {gamma} vibrations of the core coupled to the {pi}g{sub 7/2} single-particle configuration, and the favored signature of the {pi}d{sub 5/2} band, respectively.

• OSTI ID: 21286876
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 79; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BEAMS
BORON 11
CESIUM 129
CESIUM ISOTOPES
CONFIGURATION
CRANKING MODEL
DE-EXCITATION
ENERGY LEVELS
EXCITATION
EXCITED STATES
GAMMA RADIATION
GAMMA SPECTROSCOPY
MEV RANGE 10-100
NEUTRONS
PARITY
SPIN
TIN 122
VIBRATIONAL STATES