Coulomb excitation of {sup 156}Gd

Journal Article · Wed Jun 15 04:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.064308· OSTI ID:21502768

Sugawara, M ^[1]; Kusakari, H ^[2]; Yoshizawa, Y; Inoue, H ^[3]; Morikawa, T ^[4]; Shizuma, T ^[5]; Srebrny, J ^[6]

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1. Chiba Institute of Technology, Narashino, Chiba 275-0023 (Japan)
2. Faculty of Education, Chiba University, Chiba 263-8522 (Japan)
3. Faculty of Science, Hiroshima University, Higashi-hiroshima 739-8526 (Japan)
4. Department of Physics, Kyushu University, Fukuoka 812-8581 (Japan)
5. Kansai Photon Science Institute, Japan Atomic Energy Agency, Kizu, Kyoto 619-0215 (Japan)
6. Heavy Ion Laboratory, Warsaw University, Pasteura 5A, PL-02-093 Warsaw (Poland)

Multiple Coulomb-excitation experiments for {sup 156}Gd were made with a 118 MeV {sup 32}S beam and a 225 MeV {sup 58}Ni beam. The ground-state band, the {beta} band (K=0{sup +}), another K=0{sup +} band, and the {gamma} band (K=2{sup +}) were observed up to the 18{sup +}, 14{sup +}, 8{sup +}, and 12{sup +} states, respectively, while the octupole band (K=1{sup -}) was observed up to the 15{sup -} state, through the analysis of particle-{gamma}-{gamma} data. Compared with the results of the in-beam {gamma}-ray spectroscopy previously obtained, the present result suggests that a band crossing occurs in the {gamma} band. As for the {beta} band, the excitation energy of the 12{sup +} state was revised and the 14{sup +} state was newly observed in the present experiment. The intrinsic matrix elements entering the generalized intensity relations were obtained so as to reproduce the spin dependence of the E2 matrix elements extracted from the experimental results of particle-{gamma} angular correlation for the transitions within each band and between each band and the ground-state band by the least-squares search code gosia. The change of characters in the {beta} and {gamma} bands is discussed as a possible cause for the variation of the E2 matrix elements in the higher-spin region. The intrinsic matrix elements were also obtained for the E1 and E3 transitions from the ground-state band to the octupole band with K=1{sup -} through analysis by gosia.

• OSTI ID: 21502768
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 83; 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
CORRELATIONS
COULOMB EXCITATION
E1-TRANSITIONS
E3-TRANSITIONS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EXCITATION
GADOLINIUM 156
GADOLINIUM ISOTOPES
GAMMA SPECTROSCOPY
GROUND STATES
INTERMEDIATE MASS NUCLEI
ION BEAMS
ISOTOPES
LEAST SQUARE FIT
MATHEMATICAL SOLUTIONS
MATRIX ELEMENTS
MAXIMUM-LIKELIHOOD FIT
MEV RANGE
MEV RANGE 100-1000
MULTIPOLE TRANSITIONS
MULTIPOLES
NICKEL 58 BEAMS
NUCLEI
NUMERICAL SOLUTION
OCTUPOLES
PARTICLE PROPERTIES
RARE EARTH NUCLEI
SPECTROSCOPY
SPIN
STABLE ISOTOPES
SULFUR 32 BEAMS