Electron ionization of CO2

King, Stephen P.; Price, S. D.

doi:10.1016/j.ijms.2008.02.008

Cited by 39 publications

(23 citation statements)

References 43 publications

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“…Comparisons of the branching ratios of the formation of single ions for 12-keV-electron impact on CO 2 with the earlier reported results [12,13,25] for electrons of low impact energies; statistical uncertainties (%) are given in parentheses.…”

Section: Ion Speciesmentioning

confidence: 78%

“…This data when compared with our previously reported data at 12 keV electron impact (interpolated from [28]), show, on average, ∼5% higher values of PICSs; this difference may be attributed to the increased collection efficiency of the present spectrometer along with its better mass resolution compared to those of our previous setup [28] and that is the reason why we are able to collect the energetic O 2+ ions with considerable intensity in the present study. In the absence of any other experimental data for relative PICSs for ions at the present energy, we have compared the branching ratios of single-ion detection data with previously reported results of electron impact ionization of CO 2 at energies 1 keV [12,13,25] (see Table II). The ion counting statistics reported in Refs.…”

Section: Resultsmentioning

confidence: 99%

“…The production of carbon dioxide through the processing of condensed carbon monoxide with irradiation from high-energy cosmic rays is of present and future concern [24]. The ionization of CO 2 by electron impact has received much attention in the past using various techniques [4][5][6][7][8][9][10][11][12][13]25], though the dissociative multiple ionization of CO 2 has received comparatively less coverage [25][26][27] and the reported dissociative ionization data for electron impact are mostly limited to <1 keV bombarding energy.…”

Section: Introductionmentioning

confidence: 99%

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Dissociative-ionization cross sections for 12-keV-electron impact on CO2

et al. 2011

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The dissociative ionization of a CO 2 molecule is studied at an electron energy of 12 keV using the multiple ion coincidence imaging technique. The absolute partial ionization cross sections and the precursor-specific absolute partial ionization cross sections of resulting fragment ions are obtained and reported. It is found that ∼75% of single ionization, 22% of double ionization, and ∼2% of triple ionization of the parent molecule contribute to the total fragment ion yield; quadruple ionization of CO 2 is found to make a negligibly small contribution. Furthermore, the absolute partial ionization cross sections for ion-pair and ion-triple formation are measured for nine dissociative ionization channels of up to a quadruply ionized CO 2 molecule. In addition, the branching ratios for single-ion, ion-pair, and ion-triple formation are also determined.

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Section: Ion Speciesmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dissociative-ionization cross sections for 12-keV-electron impact on CO2

et al. 2011

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“…Various projectiles have been applied to generate numerous molecular ions, including synchrotron radiation [6][7][8][9][10], positively and negatively charged ions [2,5,[11][12][13][14][15][16], electrons [4,[17][18][19][20][21], and intense lasers [3,[22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, there is a scenario in between these two above, the asynchronous breakup, in which the bonds break in a single step but at a time where the vibration and rotation processes precede the fragmentation. Although numerous studies have been performed to investigate the breakup mechanism for C 0 22+ and C 0 23+ [1,3,5,6,12] with ions and laser as perturbation, the electron-impact ionization of C 0 2 and its subsequent dissociation mechanisms studies under impact energies are scarce in the available literature [4,[18][19][20]33], In the present work, a cold target recoil ion momentum spectroscopy(COLTRIMS) was adopted to study the fragmentation of C 0 22+ formed in low energy electron induced ionization of C 0 2. By measuring the momentum vectors of the fragment ions in coincidence, the KER distributions and the slopes in the two-dimensional ion-ion coincidence map for different dissociation channels were obtained.…”

Section: Introductionmentioning

confidence: 99%

Fragmentation ofCO22+in collisions with low-energy electrons

Wang

Zhang

et al. 2014

Phys. Rev. A

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The fragmentation of the C022+ dication following 200 eV electron impact double ionization was studied using a cold target recoil-ion momentum spectroscopy. Both two-body and three-body fragmentation channels were observed with an ion-ion coincidence technique. The slopes of the peaks in the coincidence spectra were extracted and compared with previous results and theoretical predictions. Overall, good agreement between theoretical and experimental results was achieved, while different behaviors were observed for the channel of fragmentation into C+ + 0 + + O with previous high energy electron impact results. The momentum vectors of ionic fragments were measured, and thus the momentum vector of the neutral particle was deduced and kinetic energy release (KER) distributions for the different fragmentation channels were obtained. KER distribution behavior also shows a different signature from that induced by high energy electron impact. Furthermore, the three-body fragmentation mechanism, i.e., dissociation in one-or two-step processes, was distinguished from their distinct signatures on the Dalitz plots and the slopes of the islands from the covariance mapping spectrum. For example, the fragmentation channel C+ + 0+ + O was found to be very similar to the 60 eV photon impact result [

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Bond‐Forming Reactions of Small Triply Charged Cations with Neutral Molecules

Fletcher

Parkes

Price

2013

Chemistry A European J

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Time‐of‐flight mass spectrometry reveals that atomic and small molecular triply charged cations exhibit extensive bond‐forming chemistry, following gas‐phase collisions with neutral molecules. These experiments show that at collision energies of a few eV, I3+ reacts with a variety of small molecules to generate molecular monocations and molecular dications containing iodine. Xe3+ and CS23+ react in a similar manner to I3+, undergoing bond‐forming reactions with neutrals. A simple model, involving relative product energetics and electrostatic interaction potentials, is used to account for the observed reactivity.

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Electron ionization of CO2

Cited by 39 publications

References 43 publications

Dissociative-ionization cross sections for 12-keV-electron impact on CO2

Dissociative-ionization cross sections for 12-keV-electron impact on CO2

Fragmentation ofCO22+in collisions with low-energy electrons

Bond‐Forming Reactions of Small Triply Charged Cations with Neutral Molecules

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