Extensive γ -ray spectroscopy of normally and superdeformed structures in 61 29Cu32

A largely extended experimental knowledge of the 61/29Cu32 nucleus has been obtained from three experiments. Excited states in 61Cu were produced via the fusion-evaporation reaction 28Si(36Ar, 3p)61Cu. In addition to the Ge array GAMMASPHERE, neutron and charged-particle detectors placed around the...

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Published in:The European physical journal. A, Hadrons and nuclei Hadrons and nuclei, 2008-06, Vol.36 (3), p.251-278
Main Authors: Andersson, L. -L., Rudolph, D., Johansson, E. K., Torres, D. A., Carlsson, B. G., Ragnarsson, I., Andreoiu, C., Baktash, C., Carpenter, M. P., Charity, R. J., Chiara, C. J., Ekman, J., Fahlander, C., Hoel, C., Pechenaya, O. L., Reviol, W., du Rietz, R., Sarantites, D. G., Seweryniak, D., Sobotka, L. G., Yu, C. H., Zhu, S.
Format: Article
Language:English
Subjects:
ENERGY LEVELS
EXCITED STATES
NEUTRONS
NUCLEAR PHYSICS AND RADIATION PHYSICS
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
SHELL MODELS
SPECTROSCOPY
TARGETS
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Summary:A largely extended experimental knowledge of the 61/29Cu32 nucleus has been obtained from three experiments. Excited states in 61Cu were produced via the fusion-evaporation reaction 28Si(36Ar, 3p)61Cu. In addition to the Ge array GAMMASPHERE, neutron and charged-particle detectors placed around the target position were used for high-performance particle spectroscopy. The constructed level scheme includes more than 160 energy levels and 320 γ-ray transitions belonging to both normally deformed as well as superdeformed rotational structures. The multipolarities have been determined for the γ-ray transitionsand as a result spin-parity assignments are given for nearly all energy levels. Experimental results in the normally deformed region are compared with predictions from large-scale shell model calculations. The collective structures are compared with results from cranked Nilsson-Strutinsky calculations. The results reveal the need to modify the standard Nilsson parameters in the mass A ~ 60 region.
ISSN:1434-6001
1434-601X
DOI:10.1140/epja/i2008-10590-9