Total and positronium formation cross sections for positron scattering from H2O and HCOOH

Casten Makochekanwa, Ana Bankovic, Wade Tattersall, Adric Jones, Peter Caradonna, Daniel S Slaughter, Kate Nixon, Michael J Brunger, Zoran Petrovic, James P Sullivan, Stephen J Buckman
2009 New Journal of Physics  
Total and positronium formation cross sections have been measured for positron scattering from H 2 O and HCOOH using a positron beam with an energy resolution of 60 meV (full-width at half-maximum (FWHM)). The energy range covered is 0.5-60 eV, including an investigation of the behavior of the onset of the positronium formation channel using measurements with a 50 meV energy step, the result of which shows no evidence of any channel coupling effects or scattering resonances for either molecule.
doi:10.1088/1367-2630/11/10/103036 fatcat:6hy2aassajg5thflixkxhxurem