The far UV emission spectrum of H2

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Abstract
A detailed, quantitative model is constructed to describe excitation of the B 1Σ+u and a 3Σ+g states in molecular hydrogen by thermal electrons with 1 eV<Te15 cm−3. The resulting radiative decay is also quantitatively modeled, and synthetic far UV spectra are produced. These synthetic spectra are compared with measured laboratory spectra from three sources, one of which is the high temperature discharge of the Alcator C tokamak. The agreement is quite good. A cross section of 1×10−18 (Eth/E)2 cm2 is deduced for electron excitation from X 1Σ+g to a 3Σ+g.

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