Total, partial, and electron-capture cross sections for ionization of water vapor by 20-150 keV protons.

نویسندگان

  • F Gobet
  • B Farizon
  • M Farizon
  • M J Gaillard
  • M Carré
  • M Lezius
  • P Scheier
  • T D Märk
چکیده

We present experimental results for proton ionization of water molecules based on a novel event by event analysis of the different ions produced (and lost). We are able to obtain mass analyzed product ion signals (e.g., H2O+, OH+, O+, O++, H+) in coincidence with the projectile analyzed after the collision, i.e., either being H+, neutral H after single electron capture during the ionization event, or H- after double electron capture. After proper calibration we are thus able to determine a complete set of cross sections for the ionization of a molecular target by protons including the total and the partial cross sections and in addition also the direct ionization and the electron capture cross sections.

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عنوان ژورنال:
  • Physical review letters

دوره 86 17  شماره 

صفحات  -

تاریخ انتشار 2001