Baird, John Patrick
The usefulness of spectral linewidth measurements as a diagnostic
tool has been recognised since it was first suggested that line
broadening could result from atomic collisions. Various theories have
been developed and modified as further experimental evidence is published.
Within this broad field, one important area has been the subject of
recent calculations (Roueff, 1974), that is, the broadening of the
sodium D lines by atomic hydrogen.
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