Plasma Shifts of Hydrogenic-Ion Lines

Systematic red shifts for the Paschen alpha, beta and gamma lines (n = 4, 5, 6 - n = 3) of He II are observed over an electron density range of (1-8) x 10 to the 22nd/cu m. The measurements are compared with combined estimates for plasma polarization and ion quadrupole effects. It is demonstrated th...

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Bibliographic Details
Published in:Physical review letters 1980-09, Vol.45 (9), p.723-726
Main Authors: Pittman, T. L., Voigt, P., Kelleher, D. E.
Format: Article
Language:English
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Summary:Systematic red shifts for the Paschen alpha, beta and gamma lines (n = 4, 5, 6 - n = 3) of He II are observed over an electron density range of (1-8) x 10 to the 22nd/cu m. The measurements are compared with combined estimates for plasma polarization and ion quadrupole effects. It is demonstrated that previous theoretical estimates have left out an important contribution to the polarization shift, which is estimated using the Debye model.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.45.723