Evidence for octupole correlations in {sup 124,125}Ba

Journal Article · Thu Dec 15 04:00:00 EST 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.72.064315· OSTI ID:20771091

Mason, P; Benzoni, G; Bracco, A; Camera, F; Million, B; Wieland, O; Leoni, S ^[1]; Singh, A K; Al-Khatib, A; Huebel, H; Bringel, P; Buerger, A; Neusser, A; Schoenwasser, G ^[2]; Nyako, B M; Timar, J; Algora, A; Dombradi, Zs; Gal, J; Kalinka, G ^[3]

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1. INFN and Dipartimento di Fisica, Universita degli Studi di Milano, via Celoria 16, I-20133 Milan (Italy)
2. Helmholtz-Institut fuer Strahlen-und Kernphysik, Universitaet Bonn, Nussallee 14-16, D-53115 Bonn (Germany)
3. Institute of Nuclear Research of the Hungarian Academy of Sciences, H-4001 Debrecen (Hungary)

The {gamma} decay of the nuclei {sup 124,125}Ba has been investigated by means of the EUROBALL spectrometer, coupled to the DIAMANT array of charged-particle detectors, using the reaction {sup 64}Ni + {sup 64}Ni at E{sub beam}=255 and 261 MeV. In the nucleus {sup 125}Ba six new E1 transitions have been found to link opposite-parity bands currently interpreted as {nu}d{sub 5/2}(+g{sub 7/2}),{nu}h{sub 11/2} structures. The previously unknown J{sup {pi}}=3{sup -} level in the nucleus {sup 124}Ba has also been identified; its excitation energy is accurately reproduced by a microscopic calculation including octupole correlations. Both issues are bolstered by sizable B(E1)/B(E2) ratios.

• OSTI ID: 20771091
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 72; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARIUM 124
BARIUM 125
CHARGED PARTICLES
CORRELATIONS
E1-TRANSITIONS
ENERGY LEVELS
EXCITATION
GAMMA DECAY
GAMMA SPECTROSCOPY
MASS NUMBER
MEV RANGE
NICKEL 64
OCTUPOLES
PARITY
PROBABILITY