Angular Distribution of (α, p) Reactions in Some Light Nuclei

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Michiya Kondo¹, Takashi Yamazaki¹, and Shotaro Yamabe¹

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¹Department of Physics, Faculty of Science, Osaka University

Received February 17, 1961

The angular distributions of the proton groups corresponding to the lower states of the residual nuclei from the reactions C ¹²(α, p )N ¹⁵_gnd; F ¹⁹(α, p )Ne ²²_{gnd, 1.28 MeV}; Al ²⁷(α, p )Si ³⁰_{gnd, 2.24 MeV}; and Si ²⁸(α, p )P ³¹_{gnd, 1.27, 2.23, 3.13∼3.51 MeV} have been measured using 22.5±0.2 MeV alpha particles. The angular distributions of the C ¹²(α, p )N ¹⁵_gnd reaction are energy dependent. At 20.6 MeV steep rise in the forward angles is observed, but at 22.2 MeV the steep rise in the backward angles appears instead of the forward rise. The angular distributions of the F ¹⁹(α, p )Ne ²² reaction are both peaked in the backward angles. The angular distributions of the Al ²⁷(α, p )Si ³⁰ and the Si ²⁸(α, p )P ³¹ reactions show the diffraction-like patterns and they are interpreted with Butler's direct interaction theory.

https://doi.org/10.1143/JPSJ.16.1091

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Angular Distribution of (α, p) Reactions in Some Light Nuclei

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