Photo-Detachment of H- in Magnetized Cascaded Arc Hydrogen Plasma
In the blue region of the magnetized hydrogen plasma the population inversion has been observed. Possible reaction responsible for the inversion is molecular ion recombination that gives an overpopulation of states 4, 5 and 6. This inversion can be eliminated by using Nd: YAG laser, λ=1064 nm (1.15 eV) to photo-detach H- (0.75 eV). Approximately 60% of Hα and less than 10% of Hβ have been destroyed.
El-Hachemi Amara and Djamila Bennaceur-Doumaz
S. M. Elhamali et al., "Photo-Detachment of H- in Magnetized Cascaded Arc Hydrogen Plasma", Advanced Materials Research, Vol. 227, pp. 208-210, 2011