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Journal of Chemical Physics / Volume 128 / Issue 14 / ARTICLES / Gas Phase Dynamics and Structure: Spectroscopy, Molecular Interactions, Scattering, and Photochemistry

J. Chem. Phys. 128, 144306 (2008); http://dx.doi.org/10.1063/1.2889382 (5 pages)

Observation of the 5p Rydberg states of sulfur difluoride radical by resonance-enhanced multiphoton ionization spectroscopy

Qun Zhang1,2, Xiaoguo Zhou1,2, Quanxin Li2, Shuqin Yu2, and Xingxiao Ma2

1Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
2Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China

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(Received 22 January 2008; accepted 6 February 2008; published online 10 April 2008)

Sulfur difluoride radicals in their ground state have been produced by a “laser-free” pulsed dc discharge of the SF6/Ar gas mixtures in a supersonic molecular beam and detected by mass-selective resonance-enhanced multilphoton ionization (REMPI) spectroscopy in the wavelength range of 408–420 nm. Analyses of the (3+1) REMPI excitation spectrum have enabled identification of three hitherto unknown Rydberg states of this radical. Following the Rydberg state labeling in our previous work [ see J. Phys. Chem. A 102, 7233 (1998) ], these we label the math(5p1) [ν0-0 = 71 837 cm−1, ω1′(a1 sym str) = 915 cm−1], math(5p2) [ν0-0 = 72 134 cm−1, ω1′(a1 sym str) = 912 cm−1], and math(5p3) [ν0-0 = 72 336 cm−1, ω1′(a1 sym str) = 926 cm−1] Rydberg states, respectively. [Origins, relative to the lowest vibrational level of the math 1A1 ground state, and vibrational frequencies of the symmetric S–F stretching mode are suggested by the numbers in brackets.] Photofragmentation process of SF2+→SF++F that relates to the REMPI spectrum was discussed.

© 2008 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENT
  3. RESULTS
  4. DISCUSSION
  5. CONCLUSION

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KEYWORDS and PACS

Keywords

free radicals, gas mixtures, ground states, molecular beams, molecule-photon collisions, multiphoton spectra, photodissociation, photoionisation, Rydberg states, sulphur compounds, vibrational states

PACS

  • 33.80.Rv

    Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states)

  • 33.80.Eh

    Autoionization, photoionization, and photodetachment

  • 33.15.Mt

    Rotation, vibration, and vibration-rotation constants

  • 33.20.Tp

    Vibrational analysis

  • 33.80.Gj

    Diffuse spectra; predissociation, photodissociation

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2889382

PUBLICATION DATA

ISSN

0021-9606 (print)  
1089-7690 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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    R. d'Agostino and D. L. Flamm, J. Appl. Phys. 52, 162 (1981)JAPIAU000052000001000162000001.

    J. T. Herron, J. Phys. Chem. Ref. Data 16, 1 (1987)JPCRBU000016000001000001000001.

    K. K. Irikura, J. Chem. Phys. 102, 5357 (1995)JCPSA6000102000013005357000001.

    S. T. Manson, Phys. Rev. 182, 97 (1969).

    E. P. F. Lee, D. K. W. Mok, F. T. Chau, and J. M. Dyke, J. Chem. Phys. 125, 104304 (2006)JCPSA6000125000010104304000001.


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