Electroexcitation of rotational bands in O18

D. M. Manley, D. J. Millener, B. L. Berman, W. Bertozzi, T. N. Buti, J. M. Finn, F. W. Hersman, C. E. Hyde-Wright, M. V. Hynes, J. J. Kelly, M. A. Kovash, S. Kowalski, R. W. Lourie, B. Murdock, B. E. Norum, B. Pugh, C. P. Sargent

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


The fourth 2+ state in O18 at an excitation energy of 8.21 MeV has been studied by high-resolution electron scattering. The Coulomb form factor for this state was measured in the momentum-transfer range 0.9q2.1 fm-1 and the extracted B(C2) value was determined to be 7.3±4.2 e2fm4. The level at 8.21 MeV is identified as a four-particle, two-hole (4p2h) state of the type p-2(sd)4. Form-factor measurements in the range 1.0q1.9 fm-1 are also presented for a strongly excited normal-parity state at 9.36 MeV. Preliminary measurements of the differential cross section for exciting this state by 135-MeV protons suggest a 2+ assignment; the measured Coulomb form factor of this state allows it to be identified as the best experimental candidate for a predicted K=2 4p2h state with the four sd-shell nucleons coupled to T=0. The excitation of these states and other members of rotational bands in O18 are discussed within the framework of structure models. Shell-model calculations for the C4 form factors of the first three 4+ states in O18 are compared to existing data.

Original languageEnglish
Pages (from-to)448-457
Number of pages10
JournalPhysical Review C - Nuclear Physics
Issue number2
StatePublished - 1990

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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