Excitation of Electronic States of Ar, H{sub 2}, and N{sub 2} by Positron Impact
Journal Article
·
· Physical Review Letters
We have measured the first state-resolved, absolute cross sections for positron excitation of electronic states of an atom or molecule using a high resolution ({Delta}E{approx}25 meV FWHM) beam of positrons from a Penning-Malmberg trap. We present cross sections for the excitation of the low-lying levels of Ar, H{sub 2}, and N{sub 2} for incident positron energies between threshold and 30eV. For Ar and H{sub 2}, comparison can be made with theoretical calculations, and, in the case of H{sub 2}, the results resolve a significant discrepancy between the only two available calculations.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40230933
- Journal Information:
- Physical Review Letters, Vol. 87, Issue 7; Other Information: DOI: 10.1103/PhysRevLett.87.073201; Othernumber: PRLTAO000087000007073201000001; 038132PRL; PBD: 13 Aug 2001; ISSN 0031-9007
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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