Augular Distributions of the Alpha Particles from the (p,α) Reactions on Na^<23> and K^<39> at 6.9〜7.3 MeV

概要

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The angular distributions of the reactions Na^<23> (p,α) Ne^<20> and K^<39> (p,α) A^<36> leading to the ground and first excited states of the residual nuclei have been measured at 6.9, 7.1 and 7.3 MeV of the incident proton energy, respectively, by the use of a semiconductor detector. For the reaction Na^<23> (p,α) Ne^<20> the angular distributions of these alpha particles are almost 90°symmetrical at 7.1 MeV of the incident proton energy, and they are slightly unsymmetrical about 90°at 7.3 and 6.9 MeV. For the reaction K^<30> (p,α) A^<36>, the angular distributions are almost 90°symmetrical at all energies of the incident protons. It is considered that the reactions Na^<23>(p,α) Ne^<20> and K^<39> (p,α) A^<36> leading to the ground and first excited states of the residual nuclei, at around 7 MeV of incident proton energy, occur through a compound nucleus process and in the former reaction the number of the compound states excited by the about 7 MeV protons are probably not so many as to justify the statistical assumption.
社団法人日本物理学会の論文
1962-01-05