High-spin states and level structure in {sup 84}Rb

Journal Article · Thu Jul 15 04:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.014306· OSTI ID:21389178

Shuifa, Shen ^[1]; Guangbing, Han ^[2]; Shuxian, Wen; Jianzhong, Gu; Xiaoguang, Wu; Lihua, Zhu; Chuangye, He; Guangsheng, Li; Beibei, Yu ^[3]; Feng, Pan ^[4]; Jianyu, Zhu ^[5]; Draayer, J P ^[6]; Tingdun, Wen ^[7]; Yan, Yupeng ^[8]

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1. State Key Laboratory Breeding Base of Nuclear Resources and Environment, East China Institute of Technology, Nanchang 330013, Jiangxi (China)
2. School of Physics, Shandong University, Jinan 250100 (China)
3. China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413 (China)
4. Department of Physics, Liaoning Normal University, Dalian 116029 (China)
5. School of Physics, Peking University, Beijing 100871 (China)
6. Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803-4001 (United States)
7. Department of Physics, North University of China, Taiyuan 030051 (China)
8. School of Physics, Suranaree University of Technology, Nakhon Ratchasima 30000 (Thailand)

High-spin states in {sup 84}Rb have been studied by using the {sup 70}Zn({sup 18}O,p3n){sup 84}Rb reaction at beam energy of 75 MeV. The gamma-gamma coincidence, excitation function, and ratios for directional correlation of oriented states were determined. A new level scheme was established in which the positive- and negative-parity bands have been extended up to 17{sup +} and 17{sup -} with an excitation energy of about 7 MeV. The signature splitting and signature inversion of the positive-parity yrast band were observed. To understand the microscopic origin of the signature inversion in the yrast positive-parity bands of doubly odd Rb nuclei, as an example, we performed calculations using the projected shell model to describe the energy spectra in {sup 84}Rb. It can be seen that the main features are reproduced in the calculations. This analysis shows that the signature splitting, especially its inversion, can be reproduced by varying only the gamma deformation with increasing spin. To research the deformation of {sup 84}Rb carefully, we calculate the total Routhian surfaces of positive-parity yrast states by the cranking shell model formalism. In addition, the results of theoretical calculations about the negative-parity yrast band in {sup 84}Rb with configuration pi(p{sub 3/2},f{sub 5/2}) x nug{sub 9/2} are compared with experimental data, and a band diagram calculated for this band is also shown to extract physics from the numerical results.

• OSTI ID: 21389178
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 82; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR CORRELATION
ANGULAR MOMENTUM
BEAMS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
COINCIDENCE METHODS
CONFIGURATION
CORRELATIONS
COUNTING TECHNIQUES
CROSS SECTIONS
DAYS LIVING RADIOISOTOPES
DECAY
DEFORMATION
DIFFERENTIAL CROSS SECTIONS
ELECTRON CAPTURE RADIOISOTOPES
ELECTRONIC STRUCTURE
EMISSION
ENERGY LEVELS
ENERGY RANGE
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITATION FUNCTIONS
FUNCTIONS
HIGH SPIN STATES
INTERMEDIATE MASS NUCLEI
ION BEAMS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
MINUTES LIVING RADIOISOTOPES
NEUTRON EMISSION
NUCLEAR DECAY
NUCLEAR DEFORMATION
NUCLEAR MODELS
NUCLEI
ODD-ODD NUCLEI
OXYGEN 18 BEAMS
PARITY
PARTICLE PROPERTIES
PROTON-EMISSION DECAY
RADIOISOTOPES
RUBIDIUM 84
RUBIDIUM ISOTOPES
SHELL MODELS
SPECTRA
SPIN
SURFACES
TARGETS
YRAST STATES
ZINC 70 TARGET