Experimental and theoretical investigation of the triple differential cross section for electron impact ionization of pyrimidine molecules

Joseph Builth-Williams, Susan Bellm, Darryl Jones, Hari Chaluvadi, D Madison, C Ning, Birgit Lohmann, Michael Brunger

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    Abstract

    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.

    Original languageEnglish
    Article number024304
    Pages (from-to)024304-1-024304-6
    Number of pages6
    JournalJournal of Chemical Physics
    Volume136
    Issue number2
    DOIs
    Publication statusPublished - 2012

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    Builth-Williams, J., Bellm, S., Jones, D., Chaluvadi, H., Madison, D., Ning, C., Lohmann, B., & Brunger, M. (2012). Experimental and theoretical investigation of the triple differential cross section for electron impact ionization of pyrimidine molecules. Journal of Chemical Physics, 136(2), 024304-1-024304-6. [024304]. https://doi.org/10.1063/1.3675167