Inelastic electron scattering from O18 at backward angles

R. M. Sellers, D. M. Manley, M. M. Niboh, D. S. Weerasundara, R. A. Lindgren, B. L. Clausen, M. Farkhondeh, B. E. Norum, and B. L. Berman
Phys. Rev. C 51, 1926 – Published 1 April 1995
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Abstract

Discrete states in O18 up to 25 MeV of excitation were studied by inelastic electron scattering. The measurements were performed at the Bates Linear Accelrator Center at 110° and 140°, and at momentum transfers ranging from about 1.2 to 2.5 fm1. A number of the states discussed here have not been observed previously. Form-factor measuremetns are presented for eight 4 candidates and for two 6 candidates. The strongest 4 state has T=2 and was observed at 22.40 MeV. Good T=2 4 candidates were found at 18.68 and 20.36 MeV, and good T=1 4 candidates were found at 8.52 and 12.99 MeV; the strongest 6 candidate was found at 14.17 MeV. Form-factor measurements are also presented for several 2 candidates. The M2 form factor for the lowest 2 state at 5.53 MeV is similar in shape to that for the lowest 2 state in O16, but is weaker in strength. Finally, form-factor measurements are presented for several high-lying normal-parity states, including strong excitations at 9.36, 9.71, 11.67, and 17.02 MeV.

  • Received 28 September 1994

DOI:https://doi.org/10.1103/PhysRevC.51.1926

©1995 American Physical Society

Authors & Affiliations

R. M. Sellers, D. M. Manley, M. M. Niboh, and D. S. Weerasundara

  • Department of Physics and Center for Nuclear Research, Kent State University, Kent, Ohio 44242

R. A. Lindgren, B. L. Clausen, M. Farkhondeh, and B. E. Norum

  • Institute of Nuclear and Particle Physics and Department of Physics, University of Virginia, Charlottesville, Virginia 22901

B. L. Berman

  • Center for Nuclear Studies and Department of Physics, The George Washington University, Washington, D.C. 20052

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Vol. 51, Iss. 4 — April 1995

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