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Electron ionization of acetylene
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10.1063/1.2777154
/content/aip/journal/jcp/127/17/10.1063/1.2777154
http://aip.metastore.ingenta.com/content/aip/journal/jcp/127/17/10.1063/1.2777154

Figures

Image of FIG. 1.
FIG. 1.

Schematic of the time-of-flight mass spectrometer used in this investigation.

Image of FIG. 2.
FIG. 2.

A characteristic (singles) mass spectrum of following electron impact ionization at .

Image of FIG. 3.
FIG. 3.

Observed ion pairs in the dissociation of and formed by electron impact ionization at .

Image of FIG. 4.
FIG. 4.

Relative PICS for forming (a) (●), (∎), and (▴), and (b) (●), and (∎), following electron ionization of . The error bars expressed in this figure represent one standard deviation of five separate determinations. The corresponding relative PICS extracted from the data of Tian and Vidal (Ref. 48) (grey) and Zheng and Srivastava (Ref. 47) (white) are also shown.

Image of FIG. 5.
FIG. 5.

Relative PICS for forming (●), (∎), and (▴), following electron ionization of . The error bars expressed in this figure represent one standard deviation of five separate determinations.

Image of FIG. 6.
FIG. 6.

Relative precursor-specific PICS for forming monocation fragments via single ionization (●) and via double ionization (◻), following electron ionization of . The representative error bars show one standard deviation of five separate determinations.

Image of FIG. 7.
FIG. 7.

Relative precursor-specific PICS for forming via double ionization (shaded square) and triple ionization (◻), following ionization of by electron impact. Also shown are relative precursor-specific PICS for forming (엯), (▵), and (◇) via dissociative triple ionization.

Image of FIG. 8.
FIG. 8.

Branching ratios for primary charge separating dissociation of , shown as a function of ionizing electron energy. The error bars represent one standard deviation of five experimental determinations.

Tables

Generic image for table
Table I.

Relative partial ionization cross sections following electron ionization of , expressed relative to the cross section for forming , as a function of electron energy . The value in parenthesis indicates the standard deviation in the last figure.

Generic image for table
Table II.

Relative precursor-specific PICS for forming cationic fragments following dissociative electron ionization of , expressed relative to the cross section for forming , as a function of electron energy . The value in parenthesis indicates the standard deviation in the last figure.

Generic image for table
Table III.

Relative precursor-specific PICS for forming cationic fragments following dissociative triple ionization of , expressed relative to the cross section for forming , as a function of electron energy . The value in parenthesis indicates the standard deviation in the last figure.

Generic image for table
Table IV.

Branching ratios for charge separating dissociation of the acetylene dication, , expressed relative to the cross section for forming , as a function of electron energy . The value in parenthesis indicates the standard deviation in the last figure.

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/content/aip/journal/jcp/127/17/10.1063/1.2777154
2007-11-05
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Electron ionization of acetylene
http://aip.metastore.ingenta.com/content/aip/journal/jcp/127/17/10.1063/1.2777154
10.1063/1.2777154
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