Structure of low-lying positive-parity states of O18

Phys. Rev. C 14, 1245 – Published 1 September 1976
R. L. Lawson, F. J. D. Serduke, and H. T. Fortune


Data on single-nucleon transfer, (t, p) cross sections, and static and dynamic electromagnetic properties place severe limitations on the structure of the low-lying positive-parity states of O18. We deduce wave functions that best reproduce these data by use of a model space that includes one collective state each of spin 0+, 2+, and 4+ together with all basis states formed from a closed O16 core plus two d52, s12 neutrons and up to one d32 neutron. There is need for only a small d32 admixture. The 0+ collective configuration is the dominant constituent of the 02+ state at 3.63 MeV, and the 2+ collective configuration dominates the 23+ state at 5.25 MeV. Overall, the data favor a small negative value (Qe-5 fm2) for the quadrupole moment of the first 2+ level. The matrix elements of the Hamiltonian that reproduce both the observed energies and transition rates are constructed. Several experiments are suggested to further probe the structure of this nucleus.

NUCLEAR STRUCTURE Deduce wave functions of O18 low-lying states that best fit single-nucleon transfer, (t ,p) data, and static and dynamic electromagnetic properties. Construct Hamiltonian that leads to these eigenfunctions.


  • Received 29 March 1976
  • Published in the issue dated September 1976

© 1976 The American Physical Society

Authors & Affiliations

R. L. Lawson and F. J. D. Serduke*

  • Argonne National Laboratory, Argonne, Illinois 60439

H. T. Fortune

  • Physics Department, University of Pennsylvania, Philadelphia, Pennsylvania 19174

  • *Work performed under the auspices of the U. S. Energy Research and Development Administration.
  • Work supported by the National Science Foundation.

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