
%0 Journal Article
%A Giovanelli, RG 
%T Excitation of Hydrogen and Ca II Under Chromospheric Conditions
%J Australian Journal of Physics
%D 1967/02/01
%V 20
%N 1
%P 81-100
%K 
%R https://doi.org/10.1071/PH670081
%U https://www.publish.csiro.au/paper/PH670081 
%X Methods are described for calculating excitation conditions in a hot gas in the absence of local thermodynamic equilibrium, taking self-absorption into account, in the approximation that excitation is uniform throughout the medium. The equilibrium excited-state populations and the emission, attenuation, and scattering properties derived from them are tabulated for a variety of physical conditions appropriate to the -solar chromosphere (7500 < T < 50000oK; 1010 < N e < 1012 cm-3) for some of the main spectral lines of hydrogen and CalI. 
