https://doi.org/10.1140/epjd/e2012-20629-0
Regular Article
Ultra-low-energy electron scattering cross section measurements of Ar, Kr and Xe employing the threshold photoelectron source
1
Department of Chemistry, Tokyo Institute of
Technology, 152-8551
Tokyo,
Japan
2
Department of Physics, Sophia University,
102-8554
Tokyo,
Japan
3
Photon Factory, Institute of Materials Structure
Science, 305-0801
Tsukuba,
Japan
a e-mail: mkitajim@chem.titech.ac.jp
Received:
31
October
2011
Received in final form:
23
January
2012
Published online:
23
May
2012
A new experimental technique for the measurements of the total cross section for electron scattering from atoms and molecules at very low energy is described. Momentum transfer cross sections for scattering from Ar, Kr and Xe at very low energies were carefully derived using the modified effective range theory from the recently measured total cross sections, which were obtained with a new experimental technique utilizing the threshold photoelectron source. A significant discrepancy between the momentum cross sections derived from the present analysis and those determined in the previous electron swarm studies was found at energies below 100 meV. The findings emphasize the need of further high precision experiments in the very low energy region as well as re-analysis of the previous swarm data.
Key words: Topical issue: Electron/Positron Collision. Guest editors: Michael Brunger, Anne Lafosse, Gaetana Laricchia, Paulo Limao-Vieira and Nigel Mason
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2012
