IMPROVED COSMIC RAY IONIZATION MODEL FOR THE IONOSPHERE AND ATMOSPHERE (CORIMIA) WITH ACCOUNT OF 6 CHARACTERISTIC INTERVALS

In this work we present our model for electron production rate calculation using ionization losses function (Bohr-Bethe-Bloch function) approximation in six characteristic energy intervals, including the charge decrease interval for electron capturing. In this way the accuracy of the obtained results is improved in comparison with fewer characteristic energy interval approximations. The model is applied to the case of galactic cosmic rays (OCR) penetration in middle atmosphere and lower ionosphere (30-120 km). The results are shown using profile evaluation for differential spectra of the full OCR composition (protons, p, alpha particles, alpha and heavier groups of nuclei: light L, medium M, heavy H, very heavy VH). The profiles are computed for solar minimum and show good agreement with the experimental data. Analytical expressions and contributions in per cent of some characteristic energy intervals are provided. These contributions reflect the physical structure of the ionization process. A submodel for investigation of atmospheric cut offs formation is created.