Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of Absolute Single and Double Electron Capture Cross
  Sections for O6+ Ions Collision with CO2, CH4, H2 and N2   The absolute electron capture cross sections for single and double charge
exchanges between the highly charged ions O6+ and CO2, CH4, H2, N2, the
dominant collision processes in the solar wind, have been measured in the
energy from 7 keV*q (2.63 keV/u) to 52 keV*q (19.5 keV/u). These measurements
were carried out in the new experimental instrument set up at Fudan University,
and the error of cross sections for single and double charge exchanges at the
1{\sigma} confidence level are about 11% and 16%, respectively. Limited
agreement is achieved with single electron capture results calculated by the
classical over-barrier model. These cross sections data are useful for
simulation ion-neutral processes in astrophysical environments and to improve
the present theoretical model of fundamental atomic processes.

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The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
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The categories of this paper are: nlin
7
The categories of this paper are: hep-th
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The categories of this paper are: econ
5
The categories of this paper are: gr-qc
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The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex