Absolute cross sections for 2s-2p excitation of N/sup 4 +/ by electron impact
Journal Article
·
· Phys. Rev., A; (United States)
Absolute cross sections have been measured for 1s/sup 2/2s /sup 2/S/sub 1/2/-1s/sup 2/2p /sup 2/P/sub 1/2,3/2/ excitation of lithiumlike N/sup 4 +/ by electron impact. For this process, which has a threshold at 10 eV, relative cross sections measured at several energies between 4 and 52 eV were normalized to a single absolute measurement taken at 15.5 eV. Similar data for Li-like C/sup 3 +/ have been previously reported and are presented for comparison. In both cases, allowing for the experimental electron energy spread, the measurements agree within experimental uncertainties with published Coulomb-Born and close-coupling calculations over the entire experimental energy range. Rate coefficients as a function of electron temperature are also presented for the N/sup 4 +/ transition.
- Research Organization:
- Joint Institute for Laboratory Astrophysics, University of Colorado and National Bureau of Standards, Boulder, Colorado 80309
- OSTI ID:
- 6248325
- Journal Information:
- Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 20:2; ISSN PLRAA
- Country of Publication:
- United States
- Language:
- English
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