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Evolution of shapes in 59Cu |
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| Authors: | C Andreoiu D Rudolph I Ragnarsson C Fahlander RAE Austin MP Carpenter RM Clark J Ekman RVF Janssens TL Khoo FG Kondev T Lauritsen T Rodinger DG Sarantites D Seweryniak T Steinhardt CE Svensson O Thelen JC Waddington |
| Institution: | Department of Physics, Lund University, S-22100 Lund, Sweden, SE Department of Mathematical Physics, Lund Institute of Technology, S-22100 Lund, Sweden, SE Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1, CA Physics Division, Argonne National Laboratory, Argonne, IL 60439, USA, US Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA, US Chemistry Department, Washington University, St. Louis, MO 63130, USA, US Institut für Kernphysik, Universit?t zu K?ln, D-50937 K?ln, Germany, DE |
| Abstract: | High-spin states in 59Cu were populated using the fusion-evaporation reaction 28Si + 40Ca at a beam energy of 122 MeV. The Gammasphere Ge-detector array in conjunction with the 4π charged-particle detector array Microball allowed for the detection of γ-rays in coincidence with evaporated light particles. The resulting extensive high-spin decay scheme of 59Cu is presented, which comprises more than 320 γ-ray transitions connecting about 150 excited states. Their spins and parities have been assigned via directional correlations of γ-rays emitted from oriented states. Average quadrupole moments of rotational bands have been determined from the analysis of residual Doppler shifts. Shell model calculations in the fp shell are invoked to study some of the low-spin states, while the experimental characteristics of the rotational bands are analyzed in the configuration-dependent cranked Nilsson-Strutinsky (CNS) approach. Received: 15 February 2002 / Accepted: 23 April 2002 |
| Keywords: | PACS 21 60 Cs Shell model – 23 20 Lv Gamma transitions and level energies – 23 20 En Angular distribution and correlation measurements – 27 50 +e 59 ?A? 89 |
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