  A major part of cosmic rays consists of the primary protons, and this portion
plays a crucial role in the space applications such as shielding of
spacecrafts. In this study, the proton flux values measured at the top of the
atmosphere through the BESS-TeV spectrometer in 2004 are introduced into the
GEANT4 simulations by using a probability grid that generates the corresponding
discrete kinetic energies with a certain discrete probability. The introduced
scheme is tested over a set of the shielding materials such as aluminum,
polypropylene, Kevlar, polyethylene, and water by computing the total absorbed
dose, which is the measure of the cumulative energy deposited in the
investigated target volumes by protons per unit mass in Gy. It is shown that
the present recipe provides the opportunity to use the discrete energy values
together with the experimental flux values, thereby demonstrating a beneficial
capability in the GEANT4 simulations for diverse space applications.
