The Shape and Shift of the Resonance Lines of Ca+ produced by Electron Collisions

Details The Shape and Shift of the Resonance Lines of Ca+ produced by Electron Collisions The Shape and Shift of the Resonance Lines of Ca+ produced by Electron Collisions

Jan 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970natur.225..374b&link_type=abstract

Nature, Volume 225, Issue 5230, pp. 374-375 (1970).

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

THE shape and shift of spectral lines can be used to determine the temperature and the particle density in either laboratory or astrophysical plasmas. The contribution to the breadth of a line from radiation damping can be neglected in all practical cases in comparison with the effects of (a) the thermal motions of the emitting atomic systems and (b) the perturbation of the emitters by neighbouring particles. The theory of the Doppler effect (a) is well known and can be considered to be independent of the pressure effect (b) with which we are concerned here.

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