Angular Distributions in the Elastic Scattering of Protons by Light Nuclei. Analysis of the Reactions Li⁷(pp)Li⁷ and Be⁹(pp)Be⁹

Author: Cohen, Emanuel Richard

Year: 1949

Degree: Dissertation (Ph.D.)

Advisor: Christy, Robert F.

Committee Member: Unknown, Unknown

Option: Physics; Mathematics

DOI: 10.7907/pemf-k490

Abstract

Use has been made of the Clebsch-Gordon series to evaluate the matrix elements involved in the onelevel dispersion model for the elastic scattering of protons by light nuclei. The results have been used to describe the resonances at 440 kev and 1024 kev in the scattering of protons by lithium and the resonances at 988 and 1077 kev in beryllium. The 440 kev lithium resonance seems to be definitely due to incident p-waves forming a compound state of Be⁸ with J = 1. The 1024 kev lithium resonance is tentatively identified as due to s-wave forming a state with J = 1, but more complete experimental data is necessary before a definite assignment can be made. The 988 kev beryllium resonance is ascribed to a level with J = 2 in B¹⁰ formed by incident a-wave protons and the observed γ-radiation is therefore electric dipole. The narrow resonance at 1077 has been ascribed to incident d-wave and J = 0.

The agreement of these assignments with other experimental data is discussed.

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