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Phys. Rev. C 66, 044311 (2002) [9 pages]

Yrast spectroscopy of 60128Nd68 and systematics of the νh11/2 crossing in A130 nuclei

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O. Zeidan*, D. J. Hartley, L. L. Riedinger, W. Reviol, W. D. Weintraub§, Y. Sun, and Jing-ye Zhang
Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996

A. Galindo-Uribarri and S. D. Paul**
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831

D. G. Sarantites and M. Devlin††
Chemistry Department, Washington University, St. Louis, Missouri 63130

M. P. Carpenter, R. V. F. Janssens, and D. Seweryniak
Physics Division, Argonne National Laboratory, Argonne, Illinois 60439

Received 6 May 2002; published 29 October 2002

High-spin states in 128Ca were populated with the 92Mo (40Ca,2p2n) reaction at a beam energy of 184 MeV. The previously known ground-state band has been extended to Iπ=(34+) and four sidebands were observed. Configuration assignments for these sidebands are discussed based on their alignment behavior. A significant delay of the νh11/2 crossing frequency is observed in the A130 region, with the largest delays occurring consistently at N=70. Cranked shell model calculations were performed in order to investigate whether a variation of deformation and/or pairing parameters can account for this phenomenon.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.66.044311
DOI:
10.1103/PhysRevC.66.044311
PACS:
21.10.Re, 23.20.Lv, 27.60.+j

*Present address: Department of Radiation Oncology, Shands Cancer Center, University of Florida, Gainesville, FL 32610.

Present address: Department of Physics, United States Naval Academy, Annapolis, MD 21402.

Present address: Chemistry Department, Washington University, St. Louis, MO 63130.

§Present address: Department of Physics, Florida State University, Tallahassee, FL 32306.

**Present address: Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai 400 005, India.

††Present address: Los Alamos National Laboratory, Los Alamos, NM 87545.