Electron and positron scattering from biomolecules

Electron and positron scattering from 1,1-C2H2F2.

1,1-difluoroethylene (1,1-C2H2F2) molecules have been studied for the first time experimentally and theoretically by electron and positron impact. 0.4-1000 eV electron and 0.2-1000 eV positron impact total cross sections (TCSs) were measured using a retarding potential time-of-flight apparatus. In order to probe the resonances observed in the electron TCSs, a crossed-beam method was used to inv...

Reactive electron scattering from biomolecules and technologically relevant molecules

Negative ion formation through dissociative electron attachment to the gas-phasevolatile anaesthetics enflurane and isoflurane (C3H2ClF5O) and to two chlorinated ethanes,pentachloroethane (C2HCl5) and hexachloroethane (C2Cl6), have been studied in a crossedelectron-molecular beam two sector field mass spectrometer experiment. Anion efficiencycurves for the negatively charged...

UKRmol: a low-energy electron- and positron-molecule scattering suite

We describe the UK computational implementation of the R-matrix method for the treatment of electron and positron scattering from molecules. Recent developments in the UKRmol suite are detailed together with the collision processes it is enabling us to treat.

Compilation and analysis of charge asymmetry measurements from electron and positron scattering on nucleon and nuclei

World data of elastic and inelastic scattering of electrons and positrons on nucleon and nuclei are compiled and discussed. The evidence of an experimental charge asymmetry different from zero, being a pure quantum effect, would be a signature of contributions beyond the Born approximation. After reviewing the published results, we compare the elastic data to a calculation which includes the bo...

Electron Microscopy of Biomolecules