Concerning the problem of lasers for the far ultraviolet range of about 500-700 A

The development of lasers in the far UV region (300-700 Angstroms) is discussed with attention to electron transitions in a plasma. A certain ratio, at 150 eV, of radiative and collision transitions gives rise to a quasi-stationary population inversion which produces laser energy at the desired frequency. A photographic analysis of the far UV laser is presented, emphasizing wave length diffraction.