Cross-section data for electron impact induced ionization of bio-molecules are important for modelling the deposition of energy within a biological medium and for gaining knowledge of electron driven processes at the molecular level. Triply differential cross sections have been measured for the electron impact ionization of the outer valence 7b 2 and 10a 1 orbitals of pyrimidine, using the (e, 2e) technique. The measurements have been performed with coplanar asymmetric kinematics, at an incident electron energy of 250 eV and ejected electron energy of 20 eV, for scattered electron angles of -5°, -10°, and -15°. The ejected electron angular range encompasses both the binary and recoil peaks in the triple differential cross section. Corresponding theoretical calculations have been performed using the molecular 3-body distorted wave model and are in reasonably good agreement with the present experiment.
J. D. Builth-Williams et al., "Experimental and Theoretical Investigation of the Triple Differential Cross Section for Electron Impact Ionization of Pyrimidine Molecules," Journal of Chemical Physics, vol. 136, no. 2, pp. 024304-1-024304-6, American Institute of Physics (AIP), Jan 2012.
The definitive version is available at https://doi.org/10.1063/1.3675167
Keywords and Phrases
Angular range; Biological medium; Differential cross section; Distorted-wave models; Ejected electrons; Electron impact; Electron impact-ionization; Electron-driven; Incident electrons; Molecular levels; Orbitals; Recoil peak; Scattered electrons; Theoretical calculations; Theoretical investigations; Triple differential cross sections; Aromatic compounds; Atomic physics; Dissociation; Electron energy levels; Electron-electron interactions; pyrimidine; pyrimidine derivative
International Standard Serial Number (ISSN)
Article - Journal
© 2012 American Institute of Physics (AIP), All rights reserved.
01 Jan 2012