The mixing in the solar core and the neutrino fluxes
  It is shown that it is possible to introduce a mixing in the solar model not in a contradiction with the present data of helioseismology. Particularly it is demonstrated that resulted violation in the sound speed profile is within the uncertainties of helioseismic data. The effect of such mixing in a spherical shell in the central zone of the Sun would be the substantial increase of the neutrino flux from 13N while all other neutrino fluxes will stay practically unchanged. The implications for future experiments are discussed. 
Anatoly Kopylov, Valery Petukhov
astro-ph.SR