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Studies of the fragmentation of the monocation and dication of methanol
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10.1063/1.3266940
/content/aip/journal/jcp/131/22/10.1063/1.3266940
http://aip.metastore.ingenta.com/content/aip/journal/jcp/131/22/10.1063/1.3266940

Figures

Image of FIG. 1.
FIG. 1.

Typical mass spectrum (singles spectrum) of methanol following ionization by 200 eV electrons.

Image of FIG. 2.
FIG. 2.

Relative PICS for forming (a) (▲), (◼), , and (◆); (b) (▲), (◼), and (▼); (c) (▼), (◼), and (▲); (d) (▼), (×), , , and (▲), following electron ionization of methanol. Where available the corresponding relative PICS from the data of Srivastava et al. (Ref. 11) are also shown as open symbols. The error bars expressed in this figure represent two standard deviations of three separate determinations.

Image of FIG. 3.
FIG. 3.

Relative precursor-specific PICS for forming (a) (◼) and (▲); (b) (◼) and (▲); (c) (◼) and (▲); (d) (◼) and (▲); (e) (◼) and (▲); (f) (◼) and (▲); (g) (◼); (h) (◼) monocation fragments via single (closed shapes) and double (open shapes) ionization, following electron ionization of methanol. The representative error bars show two standard deviations of three determinations.

Image of FIG. 4.
FIG. 4.

Relative PICS for forming (◼), (●), and (▲) following electron ionization of methanol, relative to the summed cross sections for forming the group of ions . Similar PICS extracted from the data of Rejoub et al. (Ref. 12) (open shapes) are also shown. The representative error bars expressed in this figure represent two standard deviations of three separate determinations.

Tables

Generic image for table
Table I.

Relative PICS for forming fragment ions following dissociative electron ionization of methanol, expressed relative to the cross section for forming , as a function of electron energy . The values in parenthesis indicate two standard deviations in the last figure.

Generic image for table
Table II.

Relative precursor-specific PICS for forming fragment ions following dissociative single ionization of methanol, expressed relative to the cross section for forming , as a function of electron energy . The values in parenthesis indicate two standard deviations in the last figure.

Generic image for table
Table III.

Relative precursor-specific PICS for forming fragment ions following dissociative double ionization of methanol, expressed relative to the cross section for forming , as a function of electron energy . The values in parenthesis indicate two standard deviations in the last figure.

Generic image for table
Table IV.

Ion pairs observed in the pairs spectrum recorded following electron ionization of methanol at 200 eV ionizing electron energy.

Generic image for table
Table V.

Percentage contributions to the total ion yield from single and double ionization as a function of electron energy , following electron ionization of methanol.

Generic image for table
Table VI.

KERs for two-body fragmentations following double ionization of methanol. Where available literature values are also given, along with the calculated precursor state energies of the methanol dication. The weightings of the KERs are listed, together with an average KER to facilitate a direct comparison with literature.

Generic image for table
Table VII.

KERs for three- or four-body breakups following double ionization of methanol. Where available literature values are also given, along with the calculated precursor state energies of the methanol dication . The experimental peak gradient is given, together with the peak gradient calculated using the given dissociation pathway. See text and Table VI for details.

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/content/aip/journal/jcp/131/22/10.1063/1.3266940
2009-12-08
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Studies of the fragmentation of the monocation and dication of methanol
http://aip.metastore.ingenta.com/content/aip/journal/jcp/131/22/10.1063/1.3266940
10.1063/1.3266940
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