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Infrared Photochemistry of Gas Phase Ions

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Ion Cyclotron Resonance Spectrometry II

Part of the book series: Lecture Notes in Chemistry ((LNC,volume 31))

Abstract

Experiments involving molecules which are truly isolated for time periods .exceeding several milliseconds require special techniques for particle storage at low pressure. In the case of charged species, crossed electric and magnetic fields can be used to restrain particle motion for time periods exceeding several hours, establishing conditions in the laboratory which exist in nature only in the interstellar medium. The phenomenon of ion cyclotron resonance provides a sensitive and selective means to detect charged particles stored in a magnetic field. At pressure below 10 torr stored ions are forced to maintain equilibrium with their environment by the absorption and emission of infrared radiation rather than in collisions with other molecules. Infrared lasers offer the possibility of upsetting this equilibrium by exposing molecules to an enormous photon flux at specific wavelengths. What fraction of the ion population will absorb infrared radiation at a specific wavelength? Can more than one photon be absorbed?

Contribution No. 6516

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Authors and Affiliations

  1. Arthur Ames Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, CA, 91125, USA

    L. R. Thorne (NRC NASA Resident Research Associate), C. A. Wright & J. L. Beauchamp

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  1. L. R. Thorne
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  2. C. A. Wright
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  3. J. L. Beauchamp
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Thorne, L.R., Wright, C.A., Beauchamp, J.L. (1982). Infrared Photochemistry of Gas Phase Ions. In: Ion Cyclotron Resonance Spectrometry II. Lecture Notes in Chemistry, vol 31. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-50207-1_3

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  • DOI: https://doi.org/10.1007/978-3-642-50207-1_3

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