Electron-impact excitation of He: Threshold region
- 1 June 1981
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 23 (6) , 3324-3327
- https://doi.org/10.1103/physreva.23.3324
Abstract
Differential cross sections for excitation to the states of He are studied with an electron-impact spectrometer from threshold to 4 eV above. We observe pronounced angle-dependent structures in threshold excitation to the state and in near-threshold excitation in the state. Together, these experimental findings and recent theoretical considerations suggest the existence of a new resonance near 20.8 eV.
Keywords
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