Biopolymers and cell. 2005; 21 (6): 531 - 535

Negative ions formation of the cytosine molecule by electron impact

M. I. Sukhoviya, M. I. Shafranyosh, M. O. Margitich, I. I. Shafranyosh

The absolute cross sections for negative ions formations of the nucleic acid base ─ cytosine were found first using the modern technic of normally crossed molecular and electron beams. The ionization cross section had maximum at 1.45 eV of the electron energy and was 4.2×10^-18 cm². Biophysical  consequences of the obtained results are discussing.

Key words: cytosine, negative ions, effective cross section, electron impact, damage of the cells by slow electrons.