Electron impact excitation of the spectral resolved Na-D lines

B. Stumpf, K. Becker, G. Schulz

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Abstract

Measurements of the optical excitation function and the polarisation of the spectral resolved Na-D lines (5890/5896 AA) have been carried out in the electron impact excitation of 23Na for energies from threshold (2.1 eV) up to 500 eV by means of the crossed-beam technique. A Lyotfilter of high transmission as monochromator and a sensitive photon-counting technique made it possible to detect the small intensities of the resolved Na-D doublet with sufficiently high efficiency. An unpolarised Na-D1 line for all energies of the impinging electrons was obtained, while the threshold polarisation of the Na-D2 line was found to be about 17%, in agreement with theory.

Original languageEnglish (US)
Article number008
JournalJournal of Physics B: Atomic and Molecular Physics
Volume11
Issue number20
DOIs
Publication statusPublished - 1978

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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