Scattering of low-energy electrons and positrons by atomic beryllium: Ramsauer-Townsend effect
Abstract
Total cross sections for the scattering of low-energy electrons and positrons by atomic beryllium in the energy range below the first inelastic thresholds are calculated. A Ramsauer-Townsend minimum is seen in the electron scattering cross sections, while no such effect is found in the case of positron scattering. A minimum total cross section of 0.016 a02 at 0.0029 eV is observed for the electron case. In the limit of zero energy, the cross sections yield a scattering length of -0.61 a0 for electron and +13.8 a0 for positron scattering.
- Publication:
-
Journal of Physics B Atomic Molecular Physics
- Pub Date:
- November 2014
- DOI:
- 10.1088/0953-4075/47/22/225211
- arXiv:
- arXiv:1408.1389
- Bibcode:
- 2014JPhB...47v5211R
- Keywords:
-
- Physics - Atomic Physics
- E-Print:
- doi:10.1088/0953-4075/47/22/225211