Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A model analysis of rotationally inelastic Ar + H$_2$O scattering in an
  electric field   We develop an analytic model of thermal state-to-state rotationally inelastic
collisions of asymmetric-top molecules with closed-shell atoms in electric
fields, and apply it to the Ar--H$_2$O collision system. The predicted cross
sections as well as the steric asymmetry of the collisions show at fields up to
150 kV/cm characteristic field-dependent features which can be experimentally
tested. Particularly suitable candidates for such tests are the $0_{00} \to
2_{20}$ and $1_{01} \to 2_{21}$ channels, arising from the relaxation of the
field-free selection rules due to the hybridization of $J$ states. Averaging
over the $M'$ product channels is found to largely obliterate the orientation
effects brought about by the field.

2
The categories of this paper are: math
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci