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Collisional quenching of NO between 125 and 294 K
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10.1063/1.3138178
/content/aip/journal/jcp/130/20/10.1063/1.3138178
http://aip.metastore.ingenta.com/content/aip/journal/jcp/130/20/10.1063/1.3138178

Figures

Image of FIG. 1.
FIG. 1.

Experimental arrangement with section detail of cryostat shown on top right of the figure. Ap: 1.5 mm aperture; L1: 250 mm focal-length fused silica singlet lens; L2: 150 mm focal-length UV achromatic doublet lens; L3: 100 mm focal-length achromatic doublet lens; ND: neutral density filters; Mono: 1/8 m monochromator; PMT: MCP-PMT; C: ES quartz fluorimeter cell with UV BBAR coating; W1 and W2: S1-UV windows with UV BBAR coating (four each).

Image of FIG. 2.
FIG. 2.

Examples of convolve-and-compare fitting (solid curves) to two dc-baseline-corrected fluorescence decays (circles) for mixtures of (a) 99 ppm NO in at 125 K and 101 Torr and (b) 5% and 94 ppm NO in at 125 K and 297 Torr. Best-fit values of are shown.

Image of FIG. 3.
FIG. 3.

Examples of LIF–decay-rate data and corresponding model fits using Eq. (1) for two pressure sequences of a mixture of 1% and 98 ppm NO in at 175 K. The top sequence has been offset by for clarity.

Image of FIG. 4.
FIG. 4.

Measured quenching rate coefficients for mixtures at 294 K (circles). Equation (3) was fitted to the data (solid curve) to yield best-fit values of and .

Image of FIG. 5.
FIG. 5.

Temperature dependence of the self-quenching cross section. (a) Comparison of current and previous low-temperature measurements and models. (b) Measurements used in global fit for . See Table IV for the legend to symbols and line types.

Image of FIG. 6.
FIG. 6.

Temperature dependence of the quenching cross section for . (a) Comparison of current low-temperature measurements and models. (b) Measurements used in global fit for .

Image of FIG. 7.
FIG. 7.

Temperature dependence of the quenching cross section for . (a) Comparison of current and previous low-temperature measurements and models. (b) Measurements used in global fit for .

Image of FIG. 8.
FIG. 8.

Temperature dependence of the quenching cross section for CO. (a) Comparison of current measurements and models. (b) Measurements used in global fit for .

Tables

Generic image for table
Table I.

Summary of best-fit values of NO lifetime obtained from zero-pressure intercepts of vs data. Values listed in parentheses represent the statistical uncertainty.

Generic image for table
Table II.

Summary of measurements. Values listed in parentheses represent fitting uncertainty.

Generic image for table
Table III.

Empirical models for temperature-dependent cross sections.

Generic image for table
Table IV.

Legend for Figs. 5–8.

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/content/aip/journal/jcp/130/20/10.1063/1.3138178
2009-05-22
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Collisional quenching of NO A Σ2+(v′=0) between 125 and 294 K
http://aip.metastore.ingenta.com/content/aip/journal/jcp/130/20/10.1063/1.3138178
10.1063/1.3138178
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