Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-07-31
Astron.Astrophys.414:373-376,2004
Astronomy and Astrophysics
Astrophysics
8 pages, 2 figures, 2 tables. submitted to A&A
Scientific paper
10.1051/0004-6361:20034144
The theory of collisional depolarization of spectral lines by atomic hydrogen (Derouich et al. 2003a; Derouich et al. 2003b) is extended to $f$-atomic levels $(l$=3). Depolarization rates, polarization and population transfer rates are calculated and results are given. Each cross section as a function of the effective quantum number for a relative velocity of 10 $\textrm{km s}^{-1}$ is given together with an exponent $\lambda$, if it exists, on the assumption that the cross section varies with velocity as $v^{-\lambda}$. A general trends of depolarization rates, of polarization transfer rates and of population transfer rates are given. A discussion of our results is achieved.
Barklem Paul S.
Derouich M.
Sahal-Bréchot Sylvie
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