Angular Distributions of Some γ-rays Produced in Nuclear Reactions

Citation

Day, Robert Briggs (1951) Angular Distributions of Some γ-rays Produced in Nuclear Reactions. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/mfsw-2m02. https://resolver.caltech.edu/CaltechTHESIS:02232024-173017112

Abstract

Measurement of the angular distributions of they-rays produced in nuclear reactions promises to be a fruitful method in helping to determine the spins and parities of the nuclear states involved. The methods and apparatus for doing this for proton reactions on light nuclei are described. Results are given for the following reactions: F¹⁹(p,αγ)O¹⁶ at various resonances between 850 and 1400 kev, C¹²(p,γ)N¹³ at the 1696 kev resonance, and C¹³(p,γ)N¹⁴ at the 1754 kev resonance. A short account is given of the principles involved in the calculation of angular distributions. This is followed by a discussion of the experimental results in terms of the spins and parities of the states. For the fluorine reaction this has already been done by Chao. The C¹²(p,γ)N¹³ resonance seems to be due to a compound nucleus with spin 3/2 and even parity. For the C¹³(p,γ)N¹⁴ resonance the theory does not permit a definite assignment to be made on the basis of this experiment.

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