An analysis of ${\delta }_4$ for $\alpha +\alpha$ scattering below 15 MeV (c.m.) has been made to study whether or not useful information about the direct part $V_d$ of the nucleon-nucleon interaction can be obtained. It was expected that the peripheral nature of the $l=4\mathrm{}$ interaction would allow a relatively simple analysis to be made. However, it was found that such an analysis does not exclude any of the commonly used nucleon-nucleon potentials as being inconsistent with $\alpha +\alpha$ scattering, but that proper handling of the short-range part of $V_d$ might well result in such an exclusion.

NUCLEAR REACTIONS Analysis of $\alpha +\alpha$ scattering to study direct part of nucleon-nucleon potential; $E_{\mathrm{c}.\mathrm{m}.\mathrm{}}<15\mathrm{}$ MeV.

• Received 15 January 1976

DOI:https://doi.org/10.1103/PhysRevC.14.1675