Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Angle-resolved non-resonant two-photon single ionization of argon using
  9.3 eV photons produced via high harmonic generation   We present an experimental study on the photoionization dynamics of
non-resonant one-color two-photon single valence ionization of neutral argon
atoms. Using 9.3 eV photons produced via high harmonic generation and a 3-D
momentum imaging spectrometer, we detect the photoelectrons and ions produced
from non-resonant two-photon ionization in coincidence. Photoionization from
the $3p$ orbital produces a photoelectron scattering wave function with $p$ and
$f$ partial wave components, which interfere and result in a photoelectron
angular distribution with peak amplitude perpendicular to the VUV polarization.
The comparison between the present results and two previous sets of theoretical
calculations [Pan, C. & Starace, A. F. (1991). $\textit{Physical Review A}$,
44(1), 324., and Moccia, R., Rahman, N. K., & Rizzo, A. (1983).
$\textit{Journal of Physics B: Atomic and Molecular Physics}$, 16(15), 2737.]
indicates that electron-electron correlation contributes appreciably to the
two-photon ionization dynamics.

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The categories of this paper are: math
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
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The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: astro-ph
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The categories of this paper are: q-alg
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The categories of this paper are: dg-ga