Light absorption in hydrogen plasma on the bound-free and free-free transitions of the H-H+ system

Radiative transitions in the proton-hydrogen atom system are theoretically analyzed over a wide range of wavelengths and temperatures of equilibrium hydrogen plasma. The light absorption at T∼1500–3500 K due to photodissociation and transitions in the H 2 + ion continuum is shown to make a contribution that is comparable with the photoabsorption in the electron-hydrogen atom system near the maximum of the Planck distribution.