Nuclear photon scattering by C12 and O16

W. R. Dodge, Evans Hayward, R. G. Leicht, Miles McCord, and Richard Starr
Phys. Rev. C 28, 8 – Published 1 July 1983
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Abstract

The elastic scattering cross sections for C12 and O16 have been measured in the energy ranges 23.5-39 and 25-39 MeV, respectively. These data have been compared with the Mainz total photonuclear absorption cross sections and interpreted in terms of a form factor applied to the gauge term of the Thomson amplitude as well as an E2 amplitude. For C12 the E2 strength found is 1.90.7+0.8 total, isoscalar plus isovector, energy-weighted sums, and for O16 1.250.9+1.3. All of the C12 data taken at 23.5 MeV, the peak of the giant resonance, where the real part of the scattering amplitude vanishes, have been combined to determine the total photonuclear absorption cross section at that energy, 19.7±0.4 mb. The branching ratio Γ4.4Γ0 at 23.5 MeV was found to be 0.23±0.07.

NUCLEAR REACTIONS Measured dσdΩ(γ, γ) for C12 and O16, E=2040 MeV, determined dEσE2E2.

  • Received 15 March 1983

DOI:https://doi.org/10.1103/PhysRevC.28.8

©1983 American Physical Society

Authors & Affiliations

W. R. Dodge and Evans Hayward

  • National Bureau of Standards, Washington, D.C. 20234

R. G. Leicht

  • Max-Planck Institut für Chemie, Mainz, Federal Republic of Germany

Miles McCord and Richard Starr

  • Department of Physics, The Catholic University of America, Washington, D.C. 20064

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Vol. 28, Iss. 1 — July 1983

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