Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fragmentation dynamics of diatomic molecules under proton impact:
  Kinetic energy release spectra of CO^{q+} and NO^{q+} (q = 2, 3) molecular
  ions   We report on the fragmentation dynamics of triply charged, diatomic,
molecular ions of NO and CO. Dissociative fragmentation after multiple
ionization of NO and CO is studied under the impact of 200 keV proton beam
using recoil-ion momentum spectrometer. Kinetic Energy Release distributions
(KERDs) for various fragmentation channels were obtained. We have also
calculated the potential energy curves (PECs) for ground and several excited
states of NO^{3+} and CO^{3+} molecular ion. The obtained KERDs are discussed
in the background of the calculated PECs as well as the simple Coulomb
excitation model. Coulomb breakup of the unstable precursor molecular ion shows
a clear preference for the N^{2+} + O^+ (and C^{2+} + O^+) fragmentation
channel.

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The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-lat
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-alg
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The categories of this paper are: cond-mat
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The categories of this paper are: adap-org
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The categories of this paper are: astro-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom
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The categories of this paper are: q-bio
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The categories of this paper are: acc-phys