Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unusual behavior in the first excited state lifetime of catechol   We are presenting vibrationally selective pump-probe measurements of the
first electronic excited-state (pp*) lifetime of jet-cooled neutral catechol
(1,2-dihydroxybenzene). The lifetime of the 0-0 transition is very short (7 ps)
as rationalized by the small pp*/psigma* gap calculated. However the lifetimes
implying higher out-of-plane vibrational levels are longer (~11 ps). This
emphasizes the role of the out-of-plane vibration in the pp*/psigma* coupling
not only in its nature but also in the number of quanta

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The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
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The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
18
The categories of this paper are: econ
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The categories of this paper are: eess
6
The categories of this paper are: astro-ph