Ionization of the cytosine molecule by protons:Ab initiocalculation of differential and total cross sections

We present both differential and total cross sections for the direct ionization of the cytosine molecule by protons in the incident energy range 0.1--1000.3em0exMeV. We have used the first Born approximation and included the pairwise Coulomb interactions of the ejected electron with both the scattered proton and the residual ionized target. In this model, the ground state of the cytosine molecule is described by means of an accurate one center molecular wave function.