Absolute partial cross sections for formation of (CH2+,H+), (CH+,H+), and (C+,H+) ion pairs resulting from electron-impact ionization of CH4 are reported for electron energies from threshold to 1000 eV. The product ions are mass analyzed using a time-of-flight mass spectrometer and detected with a position-sensitive detector.
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Lindsay et al. (2001) studied this question.
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