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Study of the dissociation of nitrous oxide following resonant excitation of the nitrogen and oxygen -shells
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10.1063/1.2812926
/content/aip/journal/jcp/128/2/10.1063/1.2812926
http://aip.metastore.ingenta.com/content/aip/journal/jcp/128/2/10.1063/1.2812926

Figures

Image of FIG. 1.
FIG. 1.

Total ion yield spectra recorded in the vicinity of the and (upper part) and O (lower part) transitions. The intensity ratios between the maximum of each transition (marked with arrows) and the background level (denoted by the solid gray fill) are used as estimates of the ratios of resonant to nonresonant processes in the Auger electron/ion coincidences spectra.

Image of FIG. 2.
FIG. 2.

Energy-selected Auger electron/ion coincidence spectra recorded after core-excited state relaxation. The distribution of the fragment intensity is given as a function of the ion binding energy. The thermodynamical dissociation thresholds are shown by the colored vertical lines in the upper part of the figure. The energy scale was calibrated by comparison with a high-resolution resonant Auger spectrum (dotted line) recorded at the same photon energy (Ref. 12).

Image of FIG. 3.
FIG. 3.

Energy-selected Auger electron/ion coincidence spectra recorded after core-excited state relaxation. The distribution of the fragment intensity is given as a function of the ion binding energy. The thermodynamical dissociation thresholds are shown by the colored vertical lines in the upper part of the figure. The energy scale was calibrated by comparison with a high-resolution resonant Auger spectrum (dotted line) recorded at the same photon energy (Ref. 12).

Image of FIG. 4.
FIG. 4.

Energy-selected Auger electron/ion coincidence spectra recorded after O core-excited state relaxation. The distribution of the fragment intensity is given as a function of the ion binding energy. The thermodynamical dissociation thresholds are shown by the colored vertical lines in the upper part of the figure. The energy scale was calibrated by comparison with a high-resolution resonant Auger spectrum (dotted line) recorded at the same photon energy (Ref. 12).

Image of FIG. 5.
FIG. 5.

Energy-selected photoelectron-photoion coincidence spectra recorded off resonance at . The distribution of the fragment intensity is given as a function of the ion binding energy. The thermodynamical dissociation thresholds are shown by the colored vertical lines in the upper part of the figure. The energy scale was calibrated by comparison with a high-resolution resonant Auger spectrum (dotted line) recorded at the same photon energy (Ref. 12).

Image of FIG. 6.
FIG. 6.

Branching ratios of the different ions formed by the dissociation of in the binding energy window of . The results obtained at the time of the transitions O , , and are compared with the results shown in Refs. 13, 15, 16, and 18.

Image of FIG. 7.
FIG. 7.

Ion time-of-flight peaks in the binding energy region of summed in slices for , , and O excitations. The off-resonance spectra for O excitation are also shown. For the spectra in the upper part of the figure, the sum of the area of all the peaks is equal to unity. In the lower part of the figure, the peaks are normalized to unit area.

Image of FIG. 8.
FIG. 8.

Schematic representation of the relaxation process of core-excited resulting in the competition between two channels leading to the same ionic fragments. As shown in the lower part of the figure, an analysis of the ion time-of-flight peak shape can help us to differentiate between the two channels in specific cases.

Tables

Generic image for table
Table I.

Energy positions of the first thermodynamical thresholds of formation of the fragments resulting from the dissociation of the ion.

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/content/aip/journal/jcp/128/2/10.1063/1.2812926
2008-01-11
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Study of the dissociation of nitrous oxide following resonant excitation of the nitrogen and oxygen K-shells
http://aip.metastore.ingenta.com/content/aip/journal/jcp/128/2/10.1063/1.2812926
10.1063/1.2812926
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