Production of O − from CO 2 by dissociative electron attachment

Abstract

Dissociative electron attachment cross-section measurements for the production of O − from CO 2 have been performed utilizing a crossed target-beam—electron-beam collision geometry and a quadrupole mass spectrometer. The relative flow technique is employed to determine the absolute values of cross sections. The attachment energies corresponding to the five cross-section maxima are: 4.4 ± 0.1, 8.2 ± 0.1, 13.0 ± 0.2, 16.9 ± 0.2 and 19.4 ± 0.2 eV. The cross sections at these maxima are: 1.43 × 10 −19 cm 2, 4.48 × 10 −19 cm 2, 8.1 × 10 −21 cm 2, 8.1 × 10 −21 cm 2 and 1.2 × 10 −20 cm 2, respectively.