Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Calculation of Stark resonance parameters for valence orbitals of the
  water molecule   An exterior complex scaling technique is applied to compute Stark resonance
parameters for two molecular orbitals ($1b_{1}$ and $1b_{2}$) represented in
the field-free limit in a single-center expansion. For electric DC field
configurations that guarantee azimuthal symmetry of the solution the
calculation is carried out by solving a two-dimensional partial differential
equation in spherical polar coordinates using a finite-element method. The
resonance positions and widths as a function of electric field strengths are
shown for field strengths starting in the tunnelling ionization regime, and
extending well into the over-barrier ionization region.

26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int