Dissociative electron attachment to CF2Cl2

G. Denifl, D. Muigg, I. Walker, P. Cicman, S. Matejcik, J. D. Skalny, A. Stamatovic, T. D. Märk

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Abstract

Using a recently constructed high resolution crossed electron/molecular beam apparatus consisting of a hemispherical electron monochromator and a quadrupole mass spectrometer we have measured the relative production cross sections for Cl- and F- via electron attachment to CF2Cl2. The relative Cl- cross section is placed on an absolute scale by reference to an absolute rate coefficient using a calibration method involving in-tegration of the measured anion signal. The most efficient Cl- production process is at about zero energy and its magnitude is resolution limited. The present high resolution value of 6 × 10-16cm2 compares well with an earlier value reported by Chen and Chantry. A second peak is detected at around 0.8 eV in accordance with some of the earlier beam and swarm measurements. The observed production of F- has an appearance energy of 1.9 eV and the energy of maximum cross section is 3.36 eV, the latter value comparing well with several previous studies.

Original languageEnglish
Pages (from-to)383-392
Number of pages10
JournalCzechoslovak Journal of Physics
Volume49
Issue number3
Publication statusPublished - 1999

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    Denifl, G., Muigg, D., Walker, I., Cicman, P., Matejcik, S., Skalny, J. D., Stamatovic, A., & Märk, T. D. (1999). Dissociative electron attachment to CF2Cl2. Czechoslovak Journal of Physics, 49(3), 383-392.