Electron impact total and ionization cross-sections for DNA based compounds

Abstract

This paper reports computational results of the total (complete) and total ionization cross- sections, for electron impact on Uracil (C₄H₄N₂O₂) and PO₃OH for impact energies from the ionization threshold to 2 keV. The total cross-section is evaluated using quantum mechanical approach using Spherical Complex Optical Potential (SCOP) presented as sum of the elastic and inelastic cross-sections. The ionization cross-sections are extracted from total inelastic cross-section using Complex Optical Potential–ionization contribution (CSP-ic) method. The present results are, in general, found to be in good agreement with previous theoretical results. In absence of any theoretical or experimental data, present results for PO₃OH will serve to fill the void in the data base and may also inspire the experimentalists for some measurements as it is very important target.

Keywords:

• Total Cross Sections
• Total ionisation cross sections
• DNA/RNA
• SCOP
• CSP-ic

PACS number(s):

• 34.80.Bm

Acknowledgements

MVK thanks Department of Science and Technology, New Delhi for Major Research Project Grant No: SR/S2/LOP-26/2008 and CGL thanks UGC, New Delhi for Major Research project (F.No.40-429/2011 (SR)) for financial support under which part of this work is carried out.