The band spectrum of carbon monoxide

Krupenie, Paul H.

doi:10.6028/nbs.nsrds.5

Cited by 120 publications

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“…Energetically, in the CO 2 + (C 2 Σ g + ) state the dissociative ionization reaction is accessible where the neutral CO fragment could be produced in the vibrational ground and first excited states. The production of CO(X 1 Σ + , v=2) would need 19.597eV [1,12] and is therefore not allowed, no significant contribution of O + being detected above 19.566eV. This process has been extensively discussed earlier [1,7], and Bombach et al [7], Eland [6] and Frey et al [4] were able to measure the branching ratio for the unimolecular decomposition of the C 2 Σ g + (0,0,0) level into CO(X 1 Σ + , υ = 0) and CO(X 1 Σ + , υ = 1) levels, i.e.…”

Section: Resultsmentioning

confidence: 99%

The dissociative ionization of carbon dioxide below 21.22eV. A high resolution PIPECO spectroscopic investigation

Locht

1995

International Journal of Mass Spectrometry and Ion Processes

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The photoion-photoelectron spectrum of O + , CO + and CO 2 + has been investigated under high resolution conditions. The O + ion production is found not to be restricted to the CO 2 + (C 2 Σ g + ,0,0,0) predissociation. The (0,1,0) and (1,0,0) levels are clearly shown to be involved. The CO + ion production involves all the vibrational states reached in the Franck-Condon region, i.e. up to (2,0,1) at 19.94eV. Branching ratios were measured. The CO 2 + molecular ion does not survive the predissociation in the entire energy range covered in the present work.

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Section: Resultsmentioning

confidence: 99%

The dissociative ionization of carbon dioxide below 21.22eV. A high resolution PIPECO spectroscopic investigation

Locht

1995

International Journal of Mass Spectrometry and Ion Processes

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“…As shown in fig. 5 the first threshold measured at (20.91 ± 0.04) eV belongs to the well defined peak in the first derivative of the C + ionization efficiency curve, corresponding to an ion pair formation through (1) This process has been studied in detail earlier [18]. The examination of the C + ion energy distribution near threshold (see fig.…”

Section: Discussionmentioning

confidence: 99%

“…To calibrate the electron energy scale for the appearance potential measurements of C + , the first ionization potential of CO + (X 2 Σ + ) at 14.013 eV, as determined by spectroscopy from limits of Rydberg series [1], is chosen as a reference. The ionization efficiency curve of CO + has been recorded twice a day to take into account all possible drifts due to contact potentials.…”

Section: Electron Energy Scale Calibrationmentioning

confidence: 99%

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The dissociative ionization of carbon monoxide

Locht

1977

Chemical Physics

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The dissociative ionization of CO by low energy electron impact into C + + O (or O -) and O + + C (or C -) is investigated using ion energy and mass analysis. The kinetic energy distributions are studied as a function of the impinging electron energy. The threshold energies of C + and O + are measured as a function of the released kinetic energy. The formation of the products in their ground level and with a small amount of kinetic energy mainly occurs through predissociation. The CO + electronic states involved in these processes are tentatively identified. New evidences have been found for the importance of dissociative ionization via autoionization.

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“…It is, however, quite different from the curve measured by Olmsted, Newton, and street [6]. Referring to Krupenie' s compilation of spectroscopic data on CO [7], the only known state which could contribute . , 3…”

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confidence: 84%