SPECTRAL COEFFICIENTS OF EMISSION AND ABSORPTION DUE TO ION-ATOM RADIATION COLLISIONS IN THE SOLAR ATMOSPHERE

Spectral coefficients of spontaneous emission and absorption (for 365 nm less than or equal to lambda less than or equal to 820 nm range) du e to ion-atom radiation processes H+ + H(1s) <----> H-2(+) (1 Sigma(g) ) and H+ + H(1s) <----> H(1s) + H+ are presented. Calculations have be en performed within semiclassical approach for standard solar photosph ere and chromosphere models. The presented numerical results enable th e inclusion of considered ion-atom radiative processes in the optical depth calculation for the layers mentioned. These results might be of interest as well for other astrophysical plasmas with dominant hydroge n component and temperatures around 6000 K.