Single ionization of the water molecule by electron impact: Angular distributions at low incident energy

Experimental and theoretical study of the triple-differential cross section for electron-impact ionization of thymine molecules

“…The cross sections presented in this work have been calculated in the first Born approximation (FBA) framework by using a theoretical model developed in the partial-wave formalism (see, for example, Champion et al [24,25]). In these studies, several models were tested for improving the description of the final state: (i) the Coulomb Born approximation (CBA) model (in which the ejected electron is described by a Coulomb wave, whereas the incident and the scattered electrons are described by plane waves); (ii) the distorted wave Born approximation (DWBA) model in which the ejected electron was described by means of a distorted wave function calculated by numerical resolution of the Schrödinger equation where distortion effects between the ejected species and the ionized target were introduced; (iii) the two-Coulomb-wave (2CW) model where the scattered and the ejected electrons were both described by target Coulomb waves; and finally (iv) the BBK model (see Brauner et al [26]) where the final state is described by the product of three Coulomb waves, which take into account the interaction between the scattered electron and the residual target, that between the ejected electron and the residual target and that between the scattered electron and the ejected one, respectively.…”

Thyroid cell irradiation by radioiodines: a new Monte Carlo electron track-structure code

“…Under these conditions, we have recently developed a full-differential trackstructure code for electron following-up in water whose all interaction cross sections (elastic and inelastic) were theoretically calculated and successfully compared to a large set of experimental data (Champion, 2003;MilneBrownlie et al, 2004;Champion et al, 2002Champion et al, , 2004Champion et al, , 2006. We only report in the following, the corresponding total cross sections and more details concerning the different theoretical models used for calculations can be found in our previous works.…”

“…To do that, we started from the decay spectrum of the radioiodine isotopes of interest and simulated a large number of disintegrations (of the order of 500000) by assuming that the biological medium was correctly modelled by liquid water. The simulation is only briefly reported in the following and for more details we refer the reader to our recent publication (Champion, 2003;Champion, 2005;Champion and Le Loirec 2006). Moccia (1964)).…”

Triply Differential Ionization Cross Sections of atomic and molecular targets by single electron impact

“…The method used to develop the molecular orbital wavefunctions from Gaussian03 was presented in details elsewhere [16], [17] so it will not be discussed here. In summary, the contracted Cartesian Gaussian type orbitals (CGTO), used as basis functions in Gaussian, are written as linear combinations of primitive gaussian type orbitals which are then written as function of spherical type orbitals.…”