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Detection and characterization of gas-phase GaCl using resonance enhanced multiphoton ionization

J. Chem. Phys. 97, 8880 (1992); doi:10.1063/1.463362

Issue Date: 15 December 1992

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David V. Dearden, Russell D. Johnson III, and Jeffrey W. Hudgens
Chemical Kinetics and Thermodynamics Division, Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
We report resonance enhanced multiphoton ionization (REMPI) spectra of gas-phase gallium monochloride (GaCl) produced with laser light tuned between 330 and 430 nm. The spectra originate from one, two, and three photon resonances with electronic states that reside between 29 500 and 80 000 cm−1. We have assigned five Rydberg series comprised of 20 new electronic states. Each state exhibits a short vibrational progression. A least-squares fit of the unperturbed Rydberg state origins yields the adiabatic ionization potential, IPa(GaCl)=80 540±10 cm−1. We have also identified bands that originate from one-photon resonances with the previously known a 3Pi state. We conservatively estimate the REMPI detection sensitivity for GaCl to be 109 molecules cm−3 (laser pulse)−1. The Journal of Chemical Physics is copyrighted by The American Institute of Physics.
History: Received 18 August 1992; accepted 8 September 1992
Permalink: http://link.aip.org/link/?JCPSA6/97/8880/1
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KEYWORDS and PACS

Keywords
PACS
  • 33.80.Rv
    Molecular spectra and interactions of molecules with photons Photon interactions with molecules Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states)
  • 33.60.Cv
    Molecular spectra and interactions of molecules with photons Photoelectron spectra Ultraviolet and vacuum ultraviolet photoelectron spectra
  • YEAR: 1992

PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (24)
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  17. Certain commercial materials and equipment are identified in this paper in order to adequately specify the experimental procedure. In no case does such identification imply recommendation or endorsement by the National Institute of Standards and Technology, nor does it imply that the material or equipment identified is necessarily the best available for the purpose.
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  24. We note that for the gallium atom spectrum the assignments listed in Ref. 23 and in the original data reported by W. F. Meggers, R. J. Murphy, Jr., J. Res. Natl. Bur. Stand. 48, 334 (1952) obtain physically unreasonable parameters and inconsistent assignments for the f-Rydberg series. Specifically, their assignments give delta = −0.98 at n = 4 and delta = −1.99 for n = 5–7. Our reanalysis of the original data obtains reasonable f-Rydberg solutions delta = 0.15 by reassigning their n = 4,5,6,7 to n = 5,7,8,9.

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