Coincidence measurements of electron-impact coherence parameters for $e\text{-He}$ scattering in the full range of scattering angles

Coincidence measurements of electron-impact coherence parameters for $e -He$ scattering in the full range of scattering angles

Łukasz Kłosowski, Mariusz Piwiński, Dariusz Dziczek, Katarzyna Pleskacz, and Stanisław Chwirot

Phys. Rev. A 80, 062709 – Published 7 December 2009

Abstract

Electron impact coherence parameters for inelastic $e -He$ scattering have been measured for the excitation to the $2 {{}^{1}P}_{1}$ state at collision energy of 100 eV. The experiment was conducted using angular correlation electron-photon coincidence technique with a magnetic angle changer allowing measurements in full range of scattering angles. The results are compared with other experimental data and theoretical predictions available for this collisional system.