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High Energy Chemistry

, Volume 34, Issue 5, pp 315–319 | Cite as

Stepwise photoionization of 1,2- dimethoxybenzene vapor

  • M. E. Akopyan
  • V. I. Kleimenov
  • M. V. Kleimenov
  • A. G. Feofilov
Laser Chemistry

Abstract

Processes of stepwise ionization of 1,2-dimethoxybenzene vapor by radiation in the range 295-275 nm were studied by the techniques of total current spectroscopy, mass spectrometry, electronic absorption spectroscopy, and threshold electron spectroscopy. A two-step ionization process via the first electronically excited state of the molecule yielding the molecular ion was found to prevail at an average laser radiation intensity less than 106 W/cm2. Molecular ions possess a considerable (up to 1 eV) vibrational excitation energy. As the radiation intensity increases, the progressively stronger and deeper degradation takes place via dissociation of molecular and, probably, fragment ions due to absorption of at least one additional photon.

Keywords

High Energy Chemistry Laser Radiation Intensity Stepwise Ionization Laser Photoionization Radiation Intensity Increase 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© MAIK “Nauka/Interperiodica” 2000

Authors and Affiliations

  • M. E. Akopyan
    • 1
  • V. I. Kleimenov
    • 1
  • M. V. Kleimenov
    • 1
  • A. G. Feofilov
    • 1
  1. 1.Research Institute of PhysicsSt. Petersburg State UniversitySt. PetersburgRussia

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