DIFFUSION NEAR THE SOLAR CORE

Qualitative reasoning leads to the conclusion that taking into account a proper diffusion process would provide a non-standard solar model ( NSSM) giving smaller neutrinos fluxes and being compatible with helios eismology data. The actual theory of the diffusion process is not appr oached in the present paper. It is just mentioned that a phenomenologi cal representation of the macroscopic diffusion process by a gaussian, having its maximum D-0 (of the order of 10(3) cm(2) s(-1)) at a dista nce R(0) (of the order of 0.2R.) of the solar center and a half-width R.sigma (of the order of 0.04R.) is acceptable. This phenomenological representation can be improved including in the complete description t he microscopic diffusion coefficient. The present numerical experiment appears to show that it is, possible to decrease appreciably the diff erence between observational data and NSSM.