Extensive Gamma-ray Spectroscopy of Normally and Superdeformed Structures in 61Cu

Summary, in English

A largely extended experimental knowledge of the Cu-61(29)32 nucleus has been obtained from three experiments. Excited states in Cu-61 were produced via the fusion-evaporation reaction Si-28(Ar-36, 3p)Cu-61. 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 gamma-ray transitions belonging to both normally deformed as well as superdeformed rotational structures. The multipolarities have been determined for the gamma-ray transitions and 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 similar to 60 region.

• Author: Lise-Lotte Andersson; Dirk Rudolph; Emma Johansson; D A Torres; Gillis Carlsson; Ingemar Ragnarsson; C Andreoiu; C Baktash; M P Carpenter; R J Charity; C J Chiara; Jörgen Ekman; Claes Fahlander; C Hoel; O L Pechenaya; W Reviol; Rickard du Rietz; D G Sarantites; D Seweryniak; L G Sobotka; C H Yu; S Zhu
• Department/s: Nuclear physics; Mathematical Physics
• Publishing year: 2008
• Language: English
• Pages: 251-278
• Publication/Series: European Physical Journal A. Hadrons and Nuclei
• Volume: 36
• Issue: 3
• Links: http://dx.doi.org/10.1140/epja/i2008-10590-9
• Document type: Journal article
• Publisher: Springer
• Topic: Subatomic Physics; Physical Sciences
• Status: Published
• Project: A Trilogy of Mass A=61: Superdeformed Structures, Exotic Decay, and Isospin Symmetry
• Research group: Nuclear Structure
• ISBN/ISSN/Other: ISSN: 1434-6001