Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The B-X and C-X band systems of CuCl revisited: A laser-induced
  fluorescence study in 465-490 nm   We have reinvestigated the B-X and C-X band systems of CuCl by recording the
laser-induced fluorescence excitation spectra in 20400-21800 cm^{-1}. The
rotational analyses in Hund's case (a) revealed unambiguously a
singlet-to-singlet transition nature. The measured lifetimes of a few
microseconds seem too long for singlets and too short for triplets, which we
think is actually in favor of a picture of singlet ({1}^Pi and
{1}^Sigma^{+})-triplet ({3}^Pi_{0,1,2}) mixed states in the B and C band
systems of CuCl. The two excited states we observed in our spectra may be the
singlets that have been strongly "contaminated" by their triplet neighbors.

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The categories of this paper are: q-fin
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The categories of this paper are: stat
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The categories of this paper are: econ
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The categories of this paper are: cond-mat
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The categories of this paper are: eess
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The categories of this paper are: atom-ph
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The categories of this paper are: cs
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The categories of this paper are: hep-th
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: math-ph
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The categories of this paper are: funct-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ex