XCVII. The elastic scattering of neutrons by alpha particles

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Abstract
The theory of the scattering of neutrons by alpha particles is formulated using the variational method. It is assumed that the five-body wave function can be written in the Wheeler resonating group form and allowance is made for possible two-body spin orbit coupling. Detailed numerical calculations of the S-wave phase shifts for incident neutrons below 7 mev, and of the zero energy cross section, are presented for two-body potentials having the exchange properties of an ordinary, a Majorana-Heisenberg exchange, a symmetrical exchange and a Serber interaction. Comparison of the theoretical results with experimental data strongly favours forces of the Majorana-Heisenberg or symmetrical exchange type against those of the ordinary and Serber types.

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