Vol. 13, issue 03, article # 12

pdf Bychek I. S., Lugovskoi A. V., Yancharina A. M. Mechanism of excitation of helium spectral lines at 706.5 and 587.6 nm in the e-beam plasma. // Atmospheric and oceanic optics. 2000. V. 13. No. 03. P. 256-257.
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Abstract:

The conditions for formation of the population inversion of the energy levels yielding the helium atomic transitions 33 S-23 P (λ = 706.5 nm) and 33 D-23 P (λ = 587.6 nm) are determined for the He-H2 plasma excited by a beam of low-energy (2-10 keV) electrons.