M. Tokeshi et al., DOPPLER PROFILES OF THE BALMER-ALPHA AND BALMER-BETA LINES OF THE EXCITED HYDROGEN-ATOMS (N=3,4) PRODUCED IN AR-C2H6 COLLISIONS(), Chemistry Letters, (11), 1996, pp. 943-944
The Doppler profiles of the Balmer lines are very broad; their width d
ecreases at lower ion energies. The translational energy distributions
of H calculated from the Doppler profile have two major components a
t about 10 eV and at about 100 eV for 2.5 keV of Ar+.