Plasma Shifts of Hydrogenic-Ion Lines
- 1 September 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 45 (9) , 723-726
- https://doi.org/10.1103/physrevlett.45.723
Abstract
Systematic red shifts for the Paschen , , and lines () of He II are observed over an electron density range of (1-8)× . 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 we estimate using the Debye model.
Keywords
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