Angular Distributions of Alpha-particles from F^<19>, Al^<27> and P^<31> bombarded with Protons

概要

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The angular distributions of the alpha-particles were obtained for the reactions F^<10>(p, α)O^<16> leaving the residual nucleus in the ground state, Al^<27>(p, α)Mg^<24> and P^<31>(p, α)Si^<28> leaving the residual nuclei in the ground and first excited states at four bombarding energies between 6.0 MeV and 7.4 MeV. The angular distribution for the reaction F^<19>(p, α)O^<16> shows the backward peak at each energy, but at smell angles it depends on the bombarding energy The angular distributions for the reactions A1^<27>(p, α)Mg^<24> and P^<31>(p, α)Si^<28> are also energy-dependent, but contain a larger isotropic part than those for the reaction F^<19>(p, α)O^<16>. The integrated cross sections for the reactions Al^<27>(p, α)Mg^<24> and P^<31>(p, α)Si^<28> leaving the residual nuclei in the first excited slates are several times as large as those for the reactions leaving the r residual nuclei in the ground states. It appears unlikely that these reactions can be accounted for by the formation (if compound nucleus or by simple direct interaction. The possible mechanisms I brought which these reactions may take place are discussed.
社団法人日本物理学会の論文
1961-12-05