Core excitations beyond maximally aligned configurations in 123I

Purnima Singh, A. K. Singh, A. N. Wilson, J. Rogers, H. Hübel, A. Bürger, S. Chmel, I. Ragnarsson, G. Sletten, B. Herskind, M. P. Carpenter, R. V. F. Janssens, T. L. Khoo, F. G. Kondev, T. Lauritsen, S. Zhu, A. Korichi, Hoa Ha, P. Fallon, B. M. Nyakó, J. Timár, and K. Juhász
Phys. Rev. C 85, 034319 – Published 20 March 2012

Abstract

High-spin states in 123I have been populated in the 80Se(48Ca,p4n)123I reaction at 207 MeV and γ-ray coincidence events have been recorded with the Gammasphere spectrometer. The level scheme of 123I has been extended up to spin I=63/2. The nucleus undergoes a shape transition from moderately deformed states with collective rotation at low spins to noncollective oblate configurations at higher spins. Maximally aligned terminating states involving all nine particles outside the 114Sn core and states with one particle antialigned are identified. A large number of weak transitions feed the terminating states. Cranked Nilsson-Strutinsky calculations have been performed to determine possible configurations for the observed energy levels.

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  • Received 14 December 2011

DOI:https://doi.org/10.1103/PhysRevC.85.034319

© 2012 American Physical Society

Authors & Affiliations

Purnima Singh and A. K. Singh

  • Department of Physics and Meteorology, Indian Institute of Technology Kharagpur, Kharagpur IN-721302, India

A. N. Wilson and J. Rogers

  • Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200, Australia

H. Hübel, A. Bürger, and S. Chmel

  • Helmholtz-Institut für Strahlen-und Kernphysik, Universität Bonn, Nussallee 14-16, D-53115 Bonn, Germany

I. Ragnarsson

  • Division of Mathematical Physics, LTH, Lund University, Box 118, S-22100 Lund, Sweden

G. Sletten and B. Herskind

  • Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen, Denmark

M. P. Carpenter, R. V. F. Janssens, T. L. Khoo, F. G. Kondev, T. Lauritsen, and S. Zhu

  • Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA

A. Korichi and Hoa Ha

  • CSNSM-IN2P3, F-91405 Orsay Campus, France

P. Fallon

  • Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

B. M. Nyakó and J. Timár

  • Institute of Nuclear Research of the Hungarian Academy of Sciences, H-4001 Debrecen, Hungary

K. Juhász

  • Department of Information Technology, University of Debrecen, H-4032, Hungary

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Issue

Vol. 85, Iss. 3 — March 2012

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