The electron-impact spectrum of ethylene has been determined using a high-resolution electron spectrometer. The intensity distribution obtained at 200-V electron kinetic energies agrees well with previous measurements made with 33-kV electron kinetic energies, and ultraviolet-absorption measurements except in the region of the 7.45-V transition. This discrepancy is attributed to a quadrupole transition which occurs in this region.
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Ross et al. (1966) studied this question.
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