Deformations and magnetic rotations in the Ni60 nucleus

D. A. Torres, F. Cristancho, L.-L. Andersson, E. K. Johansson, D. Rudolph, C. Fahlander, J. Ekman, R. du Rietz, C. Andreoiu, M. P. Carpenter, D. Seweryniak, S. Zhu, R. J. Charity, C. J. Chiara, C. Hoel, O. L. Pechenaya, W. Reviol, D. G. Sarantites, L. G. Sobotka, C. Baktash, C.-H. Yu, B. G. Carlsson, and I. Ragnarsson
Phys. Rev. C 78, 054318 – Published 25 November 2008

Abstract

Data from three experiments using the heavy-ion fusion evaporation-reaction 36Ar+28Si have been combined to study high-spin states in the residual nucleus Ni60, which is populated via the evaporation of four protons from the compound nucleus Ge64. The GAMMASPHERE array was used for all the experiments in conjunction with a 4π charged-particle detector arrays (MICROBALL, LUWUSIA) and neutron detectors (NEUTRON SHELL) to allow for the detection of γ rays in coincidence with the evaporated particles. An extended Ni60 level scheme is presented, comprising more than 270γ-ray transitions and 110 excited states. Their spins and parities have been assigned via directional correlations of γ rays emitted from oriented states. Spherical shell-model calculations in the fp-shell characterize some of the low-spin states, while the experimental results of the rotational bands are analyzed with configuration-dependent cranked Nilsson-Strutinsky calculations.

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  • Received 6 June 2008

DOI:https://doi.org/10.1103/PhysRevC.78.054318

©2008 American Physical Society

Authors & Affiliations

D. A. Torres* and F. Cristancho

  • Departamento de Física, Universidad Nacional de Colombia, Bogotá, Colombia

L.-L. Andersson, E. K. Johansson, D. Rudolph, C. Fahlander, J. Ekman, and R. du Rietz

  • Department of Physics, Lund University, S-22100 Lund, Sweden

C. Andreoiu§

  • Department of Physics, University of Guelph, Guelph, Ontario, Canada N1G 2W1

M. P. Carpenter, D. Seweryniak, and S. Zhu

  • Physics Division, Argonne National Laboratory, Argonne, Illinois 60493, USA

R. J. Charity, C. J. Chiara, C. Hoel, O. L. Pechenaya, W. Reviol, D. G. Sarantites, and L. G. Sobotka

  • Chemistry Department, Washington University, St Louis, Missouri 63130, USA

C. Baktash and C.-H. Yu

  • Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

B. G. Carlsson and I. Ragnarsson

  • Department of Mathematical Physics, Lund Institute of Technology, S-22100 Lund, Sweden

  • *Present address: School of Engineering and Science, University of the West of Scotland, High Street, Paisley, PA1 2BE, UK;Diego.Torres@uws.ac.uk
  • Present address: Technology and Society, Malmö University, S-205 06 Malmö, Sweden.
  • Present address: Department of Nuclear Physics, Research School of Physical Science and Engineering, The Australian National University Canberra, ACT 0200, Australia.
  • §Present address: Chemistry Department, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada.
  • Present address: Nuclear Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.

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Vol. 78, Iss. 5 — November 2008

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