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Thermal Equilibrium and Detailed Balance
Kinetic Equations of Particles
The Kinetic Equation of Photons
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Kinetic Theory of Particles and Photons: Theoretical Foundations of Non-LTE ...
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absorption and emission angle atomic absorption profile atomic emission profile atomic levels atomic rest frame balance equation blackbody radiation Boltzmann distribution broadening Brownian collisional complete redistribution Compton scattering considered corresponding de-excitation collisions defined denotes derive detailed balance Doppler Einstein coefficients elastic collision term elastic collisions electron density electron distribution function emission and absorption emitted entropy production excited atoms excited levels flux density free electrons free-free frequency given hence inelastic integral ionization isotropic kinetic equation laboratory frame Maxwell distribution Maxwellian momentum naturally populated number density occupation numbers optical depth optically thin particle types Planck function plasma principle of detailed processes production rate quantities radiation field radiative transitions re-emission reaction reciprocity relation respectively right-hand side scattering Sect source function specific intensity spectral line spontaneous emissions stimulated emissions sublevels temperature tensor thermal equilibrium Thomson scattering three-level atom tion transfer equation two-level atoms velocity distribution