Rezumat
CZU 539.19
DOI https://doi.org/10.52577/eom.2021.57.2.42
The investigation of fragmentation processes in cytosine molecules caused by an electron impact was carried out using crossed electron and molecular beams and the AM1 quantum-chemical method. The probable schemes of cytosine fragmentation, absolute values of ionization partial sections and their energetic dependences are given. It is shown that the value of the total section of formation of positively charged fragments is 2.9 times larger than the section of the molecular ion formation. The calculations of the parameters of the cytosine molecule and its ions were performed.
Keywords: secondary electrons, cytosine, electron impact, ionization cross sections, energy dependences, fragmentation schemes, molecular ion.