Angular Distributions of 4.43-Mev Gamma Radiation from C12(p, pγ)C12

H. S. Adams, J. D. Fox, N. P. Heydenburg, and G. M. Temmer
Phys. Rev. 124, 1899 – Published 15 December 1961
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Abstract

The yield at 90 degrees, and 32 angular distributions of the 4.43-Mev gamma ray from the first-excited state of C12 have been measured for proton bombarding energies between 5 and 12 Mev. The excitation curve for inelastic scattering is characterized by a number of strong resonances, some of which were previously known. In addition, underlying the resonances, there is a monotonically rising background. The angular distributions were fitted by least squares to the expression W(θ)=A0+A2P2(cosθ)+A4P4(cosθ). Those obtained in the region of the resonances at Ep=5.36 Mev and Ep=5.89 Mev can be interpreted by taking into account these two resonances with respective characters 32+ and 52+ plus one additional state at an excitation energy of 6.38 Mev (52+) in the compound nucleus N13 which can be seen only in elastic scattering. A simple direct-reaction model using a nucleon-nucleon interaction accounts very well for four angular distributions at higher energies in regions showing no resonant structure.

  • Received 7 August 1961

DOI:https://doi.org/10.1103/PhysRev.124.1899

©1961 American Physical Society

Authors & Affiliations

H. S. Adams, J. D. Fox, N. P. Heydenburg*, and G. M. Temmer*

  • Department of Physics, Florida State University, Tallahassee, Florida

  • *Also Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, D. C.

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Vol. 124, Iss. 6 — December 1961

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