Absolute total and partial cross sections for ionization of nucleobases by proton impact in the Bragg peak velocity range

作者：Tabet J^*; Eden S; Feil S; Abdoul Carime H; Farizon B; Farizon M; Ouaskit S; Maerk T D

来源：Physical Review A, 2010, 82(2): 022703.

DOI：10.1103/PhysRevA.82.022703

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.

• 出版日期2010-8-5