High-spin structures and alignment properties in 126Ce

A. N. Wilson*, R. Wadsworth, J. F. Smith, S. J. Freeman, M. J. Leddy, C. J. Chiara, D. B. Fossan, D. R. LaFosse, K. Starosta, M. Devlin, D. G. Sarantites, J. N. Wilson, M. P. Carpenter, C. N. Davids, R. V.F. Janssens, D. Seweryniak, R. Wyss

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Excited states in 126Ce have been observed with the GAMMASPHERE γ-ray detector array, used in conjunction with the MICROBALL charged-particle detector. The reaction 64Zn(64Zn, xpn α) (beam energy 260 MeV) was used to populate a wide range of nuclei in the neutron-deficient region with A ≈ 120. 126Ce was populated via the 2p evaporation channel. The three previously observed bands have been extended to higher spins and some other structures have been identified. The yrast band shows evidence of a delayed neutron alignment occurring at a rotational frequency ω≈0.5 MeV/ℏ as observed in the neighboring odd-/4 nucleus 127Pr. One of the two excited bands shows evidence for a similar crossing at a slightly lower frequency and also exhibits a sudden gain in alignment at ω=0.57 MeV/ℏ. The third band may involve the coupling of a γ-vibrational state. All three rotational bands are discussed in terms of standard and extended cranked shell model calculations.

Original languageEnglish
Article number054307
Pages (from-to)543071-5430711
Number of pages4887641
JournalPhysical Review C - Nuclear Physics
Issue number5
Publication statusPublished - May 2001

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