Flux of Secondary Particles induced by Solar Neutrons and Protons

At the 30th International Conference on Cosmic Rays we reported the fluxes of secondary particles produced by solar neutrons and protons. The fluxes were calculated using two Monte Carlo codes, GEANT4 and CORSIKA. We found systematic differences between the fluxes of neutrons predicted by the two codes, but not between the fluxes of electrons or photons. We investigated the former difference, and found two feasible causes, as described in [1]. In [1] we discussed neutron fluxes at an observational altitude of 600 g/cm2 only. However, observations were made at various altitudes, 5,250 m (Chacaltaya), 4,200 m (Tibet and Mauna Kea, Hawaii), 2,770 m (Mt. Norikura) and ground level. Monte Carlo techniques are needed to deduce the intensity of solar particles incident at the top of the atmosphere from observations made at these altitudes. In this paper we provide basic data for this conversion. (authors)