Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Monte Carlo calculation of the translational relaxation of superthermal
  H atoms in thermal H2 gas   We propose a simple and reliable method to study the translational relaxation
of 'hot' H atoms following their production by chemical mechanisms. The problem
is relevant to PDR's, shocks, photospheres, atmospheric entry problems. We show
that the thermalization of H atoms can be conveniently studied by a simple
method and set the basis for further investigations. The method adopted is
Monte Carlo method including the thermal distribution of background molecules.
The transport cross section is determined by the inversion of transport data.
Plots of the collisions density of H atoms in H$_{2}$ gas are calculated and
discussed also in the context of simple theories. The application of the
results to astrophysical problems is outlined including numerical results for
the reaction H + H$_{2}$O $\rightarrow$ H$_{2}$ + OH.

9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom