High resolution UV photoelectron spectroscopy of CO+2, COS+ and CS+2 using supersonic molecular beams

Wang, Lai-Sheng; Reutt, J.E.; Lee, Y.T.; Shirley, D. A.

doi:10.1016/0368-2048(88)85010-2

Cited by 159 publications

(126 citation statements)

References 45 publications

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“…The entire vibrational structure is observed. Only the Fermi resonance (0,2,0/1,0,0) doublet [9] is not resolved in the present work.…”

Section: Resultsmentioning

confidence: 85%

“…The amount of trans-lational energy carried by O + and CO + being of the same order of magnitude, the discrimination due to this effect is negligible. In the same table the ionization energies and vibrational assignments from the literature [9] and the results of the present work are displayed.…”

Section: Resultsmentioning

confidence: 99%

“…The first ionization energy of the X 2 Σ g + state of CO 2 at 13.7778 ± 0.0001 eV [9] is used for the photoelectron energy scale calibration. The background mass spectrum, recorded with the He(I) resonance line, is shown to be nitrogen and oxygen free.…”

Section: Resultsmentioning

confidence: 99%

“…Branching ratios for nearly all vibrational levels of the C 2 Σ g + state of CO 2 + could be measured. Only the Fermi resonance doublet (1,0,0/0,2,0) [9] could not be resolved under these conditions.…”

Section: Introductionmentioning

confidence: 94%

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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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“…The entire vibrational structure is observed. Only the Fermi resonance (0,2,0/1,0,0) doublet [9] is not resolved in the present work.…”

Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 94%

See 2 more Smart Citations

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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“…Photoelectron spectroscopy ͑PES͒ [21][22][23][24][25] and photoionisation studies 26 give a value of 11.1736Ϯ0.0015 eV ͑90121Ϯ12 cm Ϫ1 ͒ 26 for the ionisation threshold for forming the lower ͑ 2 ⌸ 3/2 ͒ spin-orbit state of the OCS ϩ ion and a spin-orbit splitting ͑ca. 47 meV, 368 cm Ϫ1 ͒ in good agreement with that deduced from analysis of the OCS ϩ (ÃϪX) laser induced fluorescence ͑LIF͒ [27][28][29] and the laser induced fragmentation spectra of OCS ϩ .…”

Section: Introductionmentioning

confidence: 99%

Resonance enhanced multiphoton ionization spectroscopy of carbonyl sulphide

Morgan

Orr‐Ewing

Ascenzi

et al. 1996

The Journal of Chemical Physics

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Rydberg excited states of the OCS molecule in the energy range 70500-86000 cm Ϫ1 have been investigated via the two and three photon resonance enhancements they provide in the mass resolved multiphoton ionization ͑MPI͒ spectrum of a jet-cooled sample of the parent molecule. Spectral interpretation has been assisted by companion measurements of the kinetic energies of the photoelectrons that accompany the various MPI resonances. The present study supports the earlier conclusions of Weinkauf and Boesl ͓J. Chem. Phys. 98, 4459 ͑1993͔͒ regarding five Rydberg origins in the 70500-73000 cm Ϫ1 energy range, attributable to, respectively, states of 3 ⌸, 1 ⌸, 3 ⌬, 1 ⌬ and 1 ⌺ ϩ symmetry arising from the 4p←3 orbital promotion. We also identify a further 21 Rydberg origins at higher energies. These partition into clumps with quantum defects ca. 3.5 and 4.5, which we associate with the orbital promotions np←3 (nϭ5,6), and others with near integer quantum defect which are interpretable in terms of excitation to s,d and ͑possibly͒ f Rydberg orbitals. We also identify MPI resonances attributable to CO(X 1 ⌺ ϩ ) fragments and to S atoms in both their ground ( 3 P) and excited ( 1 D) electronic states. Analysis of the former resonances confirms that the CO(X) fragments resulting from one photon dissociation of OCS at excitation wavelengths ca. 230 nm are formed with a highly inverted, bimodal rotational state population distribution, whilst the latter are consistent with previous reports of the wavelength dependence for forming ground and excited state S atoms in the near uv photolysis of OCS.

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Laser photoelectron spectroscopy: spectroscopy and dynamics of excited states in small and medium‐sized molecules

Lange

2001

Advances in Chemical Physics

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High resolution UV photoelectron spectroscopy of CO+2, COS+ and CS+2 using supersonic molecular beams

Cited by 159 publications

References 45 publications

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

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

Resonance enhanced multiphoton ionization spectroscopy of carbonyl sulphide

Laser photoelectron spectroscopy: spectroscopy and dynamics of excited states in small and medium‐sized molecules

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