Transitional nuclei in the rare-earth region: Energy levels and structure of Ce130,132, Nd132,134, and Pm134, via β decay of Pr130,132, Pm132,134, and Sm134

M. O. Kortelahti, B. D. Kern, R. A. Braga, R. W. Fink, I. C. Girit, and R. L. Mlekodaj
Phys. Rev. C 42, 1267 – Published 1 October 1990
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Abstract

An investigation of low-lying energy levels of Ce130,132, Nd132,134, and Pm134 has been made via β decay, especially of those levels in the Kπ=2+ gamma band in the even-even nuclei. The radioactive parent nuclei were produced by the Mo92(46Ti,xpyn) and Sn112(28Si,xpyn) reactions with bombarding energies of 170 to 240 MeV. An isotope separator enabled A=134 mass identification. Level schemes of these five nuclei were constructed from γ-γ-t coincidence data. The β-decay half-lives of the parent nuclei, Pr130, Pr132, Pm132, Pm134, and Sm134, were determined to be 40±4, 96±18, 8.8±0.8, 23±2, and 9.3±0.8 s, respectively. The suitability of the proton-neutron interaction boson model in describing Ce130, Ce132, Nd132, and Nd134 is supported by the comparison of experimental relative E2 transition probabilities with proton-neutron interaction boson model predictions.

  • Received 18 April 1990

DOI:https://doi.org/10.1103/PhysRevC.42.1267

©1990 American Physical Society

Authors & Affiliations

M. O. Kortelahti

  • Louisiana State University, Baton Rouge, Louisiana 70803

B. D. Kern

  • University of Kentucky, Lexington, Kentucky 40506

R. A. Braga and R. W. Fink

  • School of Chemistry, Georgia Institute of Technology, Atlanta, Georgia 30332

I. C. Girit

  • UNISOR and Vanderbilt University, Nashville, Tennessee 37235

R. L. Mlekodaj

  • UNISOR, Oak Ridge Associated Universities, Oak Ridge, Tennessee 37831

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Vol. 42, Iss. 4 — October 1990

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