Tabet, J.; Eden, S.; Feil, S.; Abdoul-Carime, H.; Farizon, B.; Farizon, M.; Ouaskit, S. and Märk, T. D.
(2010).
Absolute total and partial cross sections for ionization of nucleobases by proton impact in the Bragg Peak velocity range.
Physical Review A, 82(2),
022703-1-022703-5.
(
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Abstract
We present experimental results for proton ionization of nucleobases (adenine, cytosine, thymine, and uracil) based on an event-by-event analysis of the different ions produced combined with an absolute target density determination. We are able to disentangle in detail the various proton ionization channels from mass-analyzed product ion signals in coincidence with the charge-analyzed projectile. In addition we are able to determine a complete set of cross sections for the ionization of these molecular targets by 20–150 keV protons including the total and partial cross sections and the direct-ionization and electron-capture cross sections.
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