title: Experimental and theoretical investigation of the triple differential cross section for electron impact ionization of pyrimidine molecules.
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.
authors.affiliation: ARC Centre of Excellence for Antimatter-Matter Studies, Flinders University, GPO Box 2100, Adelaide, South Australia 5001, Australia.
authors.forename: J D
authors.initials: JD
authors.lastname: Builth-Williams
authors.forename: S M
authors.initials: SM
authors.lastname: Bellm
authors.forename: D B
authors.initials: DB
authors.lastname: Jones
authors.forename: Hari
authors.initials: H
authors.lastname: Chaluvadi
authors.forename: D H
authors.initials: DH
authors.lastname: Madison
authors.forename: C G
authors.initials: CG
authors.lastname: Ning
authors.forename: B
authors.initials: B
authors.lastname: Lohmann
authors.forename: M J
authors.initials: MJ
authors.lastname: Brunger
mesh_terms: D004583:Electrons; D011743:Pyrimidines / Q000737:chemistry*; D011789:Quantum Theory
chemical_list: D011743:Pyrimidines; C030986:pyrimidine