Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collisional depolarization and transfer rates of spectral lines by
  atomic hydrogen. II: application to d states of neutral atoms   The theory of collisional depolarization of spectral lines by atomic hydrogen
(Derouich et al. \cite{derouich1}) is extended to $d$ $(l$=2) atomic levels.
Depolarization rates, polarization and population transfer rates are calculated
and results are given as a function of the temperature. Cross sections as a
function of the effective quantum number for a relative velocity of 10
$\textrm{km s}^{-1}$ are also given together with velocity exponents $\lambda$,
if \textbf{they exist}, on the assumption that the cross section varies with
velocity as $v^{-\lambda}$. A discussion of our results is presented.

22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga