New type of shift of hydrogen and hydrogenlike spectral lines.

Details New type of shift of hydrogen and hydrogenlike spectral lines. New type of shift of hydrogen and hydrogenlike spectral lines.

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jqsrt..58..821o&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 58, issue 4-6, pp. 821-826

Physics

13

Hydrogen Lines: Plasma, Hydrogen Lines: Stark Effect, Plasma: Atomic Processes

Scientific paper

A new contribution to the center of gravity shift (CGS) of spectral lines in plasmas is presented: a coupled ionic-electronic shift. It originates from the coupling between the ion-quadrupole corrections to the intensities and the semiclassical electron impact shifts of individual Stark components. It is shown that this shift is the leading ionic contribution to the CGS. The new shift has a non-linear dependence on the density Ne, being proportional to Ne4/3. Therefore its contribution relative to the pure electron shift increases with the density. Also it is shown that the well-known results on the ion quadrupole contribution to the CGS by Demura and Sholin are erroneous from both the physical and mathematical points of view.

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