  The possibility of estimating the mass composition of primary cosmic rays
above the knee of its energy spectrum through the study of high energy gamma
rays, muons and neutrinos produced in the interactions of cosmic rays with the
solar ambient matter and radiation has been explored. It is found that the
theoretical fluxes of TeV gamma rays, muons and neutrinos from a region around
$15^{o}$ of the Sun are sensitive to mass composition of cosmic rays in the PeV
energy range. The experimental prospects for detection of such TeV gamma
rays/neutrinos by future experiments are discussed.
