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State dynamics of acetylene excited to individual rotational level of the subbands
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10.1063/1.2437205
/content/aip/journal/jcp/126/9/10.1063/1.2437205
http://aip.metastore.ingenta.com/content/aip/journal/jcp/126/9/10.1063/1.2437205

Figures

Image of FIG. 1.
FIG. 1.

Schematic representation of acetylene states in the energy range (Refs. 10–12).

Image of FIG. 2.
FIG. 2.

The IR emission spectra recorded at and spectral resolution at different delay times after the exciting laser pulse, 1–8: 1, 3, 10, 20, 50, 200, 500, and delays.

Image of FIG. 3.
FIG. 3.

Time evolution of the IR emission signal measured at ; traces 1–7 correspond to 7157, 6506, 5223, 3864, 3262, 1962, and bands, respectively.

Image of FIG. 4.
FIG. 4.

Pressure plots of the emission buildup and decay rates, and ; traces 1–7 correspond to 7157, 6506, 5223, 3864, 3262, 1962, and bands, respectively.

Image of FIG. 5.
FIG. 5.

Time evolution of the IR emission signal measured at for the superposition of the two lowest-energy bands (606 and ).

Image of FIG. 6.
FIG. 6.

Pressure plots of the emission buildup rate, , and emission decay rates, and , for the two lowest-energy emission bands.

Image of FIG. 7.
FIG. 7.

(a) CRD traces measured for the acetylene pressure of without and with the excitation pulse at (probe pulse at ); (b) difference between traces with and without excitation; (c) kinetics of the difference signal with the intrinsic CRD decay subtracted, calculated as ; (d) kinetics of the intermediate absorption, calculated as .

Image of FIG. 8.
FIG. 8.

The vs (c) and vs dependences.

Image of FIG. 9.
FIG. 9.

(a) CRD intermediate absorption spectrum measured for the acetylene pressure of excited at , resolution, represented in absolute optical density scale; (b) rotational line at recorded with resolution of ; (c) rotational line at recorded with resolution of in the presence of a magnetic field.

Image of FIG. 10.
FIG. 10.

Experimental and theoretical IR emission traces for the band. Theoretical calculations used Eq. (26).

Image of FIG. 11.
FIG. 11.

Correlation between the Einstein coefficient value and the decay rate constant for the IR emission bands. The lines were drawn using linear and square-root regressions.

Tables

Generic image for table
Table I.

Parameters of the IR emission dynamics; the models are described in the text.

Generic image for table
Table II.

Buildup and decay rate constants for the probe wavelength of .

Generic image for table
Table III.

Frequencies of the fundamental modes and anharmonicity parameter values of the acetylene ground state.

Generic image for table
Table IV.

Proposed assignments of the observable IR transitions.

Generic image for table
Table V.

Values of the and parameters for different subbands of the transition.

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/content/aip/journal/jcp/126/9/10.1063/1.2437205
2007-03-01
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: State dynamics of acetylene excited to individual rotational level of the V12K10,1,2 subbands
http://aip.metastore.ingenta.com/content/aip/journal/jcp/126/9/10.1063/1.2437205
10.1063/1.2437205
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