Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simulation of Time-Resolved Vibronic Spectra and the possibility of
  analyzing molecules with similar apectral properties   The possibility of using time-resolved vibronic spectroscopy for spectral
analysis of mixtures of chemical compounds with similar optical properties,
when traditional methods are inefficient, is demonstrated by using the method
of computer simulation. The analysis is carried out by the example of molecules
of a series of polyenes (butadiene, hexatraene, octatetraene, decapentaene, and
decatetraene), their various cis- and trans-rotational isomers, and
phenyl-substituted polyenes. Ranges of relative concentrations of molecules
similar in their spectral properties, where reliable interpretation of
time-resolved spectra of mixtures and both qualitative and quantitative
analyses are possible, are determined. The use of computer simulation methods
for oprimizing full-scale experiments in femtosecond spectroscopy is shown to
hold much promise.

37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int