|670.77561||1/2||3/2||1||0, 1, 2|
|670.77682||1/2||3/2||2||1, 2, 3|
is the natural broadening parameter.
(b) [a.u. ] is the broadening cross-section for collisions with neutral hydrogen at relative velocity (Anstee & O'Mara 1995).
(c) is the velocity dependence of .
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