Electron-photon coincidence measurements on He (31P) excitation at large scattering angles
- 14 April 1982
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 15 (7) , L247-L251
- https://doi.org/10.1088/0022-3700/15/7/004
Abstract
The lambda and chi parameters for He(31P) excitation by electron impact at 81.2 eV have been measured for scattering angles in the range from 60 to 120 degrees . The values of lambda show two deep minima and the values for chi show a broad maximum value, similar to previous 21P measurements. The results are not in agreement with values calculated from the first Born approximation, a distorted-wave polarised-orbital method, a multichannel eikonal method and a first-order, many-body approximation.Keywords
This publication has 8 references indexed in Scilit:
- A scattered-electron cascaded-photon coincidence experiment on the electron impact excitation, of the 31D state of heliumJournal of Physics B: Atomic and Molecular Physics, 1981
- Angular correlation measurements for the electron-excited 31P state of heliumJournal of Physics B: Atomic and Molecular Physics, 1981
- Alignment and orientation of the 21P state of helium by electron impact at 29.6 and 51.2 eVJournal of Physics B: Atomic and Molecular Physics, 1980
- Coherent excitation of the 21P state of He for large momentum transfer electron scatteringJournal of Physics B: Atomic and Molecular Physics, 1979
- Electron impact excitation of the n1P(n=2-5) and 23P states of helium at intermediate energiesJournal of Physics B: Atomic and Molecular Physics, 1976
- Photon Vector Polarization and Coherence Parameters in an Electron-Photon Coincidence Experiment on HeliumPhysical Review Letters, 1976
- Electron-photon angular correlations in electron-helium collisions for 31P excitationsJournal of Physics B: Atomic and Molecular Physics, 1975
- A ten-channel eikonal treatment of differential and integral cross sections and of the (λ,χ) parameters for the n=2 and 3 excitations of helium by electron impactJournal of Physics B: Atomic and Molecular Physics, 1975