Section III. Nuclear physics and astrophysics
Cross sections and astrophysical S̃ factor for the 7Li(p, α) reaction at low energies

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Abstract

The energy dependence of the total cross section and the astrophysical S̃ factor down to 20 keV are presented for the 7Li(p, α) reaction. The results were obtained by using the known S̃ factor for the 6Li(p, α) reaction and the slopes of thick target yield vs energy for the two reactions. This relative method avoids several major difficulties with thick target measurements at low energies. Good agreement is obtained with the higher energy results of Spinka, Tombrello, and Winkler and the results of Rolfs and Kavanagh.

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