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The VUV Absorption Spectrum of Lead Monoxide.

Bredohl1, Breton, Dubois

  • 1Institut d' Astrophysique et de Géophysique, Université de Liège, Liège, B-4000, Belgium

Journal of Molecular Spectroscopy
|March 14, 2000
PubMed
Summary

This study presents the first observation of the vacuum ultraviolet (VUV) absorption spectrum for lead monoxide (PbO) vapor. Researchers identified four ionization energies linked to electronic states of the PbO(+) ion.

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Area of Science:

  • Atomic and Molecular Physics
  • Gas-Phase Spectroscopy
  • Electronic Structure

Background:

  • Lead monoxide (PbO) is a diatomic molecule with significant electronic transitions.
  • Understanding the electronic states of PbO(+) is crucial for various chemical and physical applications.
  • Previous studies have limited data on the VUV absorption spectrum of PbO vapor.

Purpose of the Study:

  • To experimentally determine the vacuum ultraviolet (VUV) absorption spectrum of PbO vapor.
  • To identify and characterize the electronic states of the PbO(+) ion.
  • To measure the ionization energies of PbO.

Main Methods:

  • Observation of the VUV absorption spectrum of PbO vapor down to 300 Å.
  • Analysis of Rydberg series in the absorption spectrum.

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  • Determination of ionization energies from spectral data.

    • Main Results:

    • The VUV absorption spectrum of PbO vapor was observed for the first time.
    • Four ionization energies were determined: 8.73 eV, 8.83 eV, 12.81 eV, and 26.28 eV.
    • These energies correspond to the X(2Π), A(2Σ+), B(2Σ+), and C(2Σ+) electronic states of the PbO(+) ion.

    Conclusions:

    • The study successfully characterized the VUV absorption spectrum of PbO vapor.
    • The determined ionization energies provide valuable data for understanding the electronic structure of PbO(+) ion.
    • This research establishes a foundation for further spectroscopic investigations of lead monoxide.