Nonrelativistic energy levels of D2

Nonrelativistic energies of the deuterium molecule, accurate to 10−7–10−8 cm−1 for all levels located up to 8000 cm−1 above the ground state, are presented.

Rotational and gas temperatures of molecular deuterium in a hollow cathode glow discharge

We report the results of optical emission spectroscopy measurements of rotational Trot and translational (gas) temperature of deuterium molecules. The light source was a low-voltage high-pressure hollow cathode (HC) glow discharge with titanium cathode operated in deuterium. The rotational temperature of excited electronic states of D2 was determined from the intensity distribution in the rotational structure of Q-branches of the two Fulcher-α diagonal bands: [ν′ = ν″ = 2] and [ν′ =ν″ = 3]. The population of the excited energy levels, determined from relative line intensities, was used to derive the radial distributions of the temperature of the excited and the ground state of the deuterium molecule.