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Dynamics of Molecular Photodissociation

  • Chapter
Collision Theory for Atoms and Molecules

Part of the book series: NATO ASI Series ((NSSB,volume 196))

Abstract

Photodissociation is the break-up of an initially bound (diatomic or polyatomic) molecule through the absorption of light. If the dissociation energy is small (≲ 100meV) as it is usually the case for van der Waals molecules, for example, an infra-red (IR) photon is sufficient to break the weak bond. The energy of the photon is first selectively deposit in an internal mode and then transfered to the van der Waals mode by intramolecular forces. The electronic structure of the parent molecule is not changed by IR-absorption and therefore the dissociation occurs entirely in the ground electronic state. The lifetime of the excited complex is typically longer than a ps and depends sensitively on the strength of the intramolecular forces. This type of (rotational/vibrational) predissociation has been amply studied in the past, both experimentally and theoretically.1 It is still an active field and many new results are expected in the future.

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  1. Max-Planck-Institut für Strömungsforschung, 3400, Göttingen, Germany

    Reinhard Schinke

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  1. Reinhard Schinke
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  1. Cittá Universitaria, The University of Rome, Rome, Italy

    Franco A. Gianturco (Gianturco) (Gianturco)

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© 1989 Plenum Press, New York

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Schinke, R. (1989). Dynamics of Molecular Photodissociation. In: Gianturco, F.A. (eds) Collision Theory for Atoms and Molecules. NATO ASI Series, vol 196. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-5655-4_8

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  • DOI: https://doi.org/10.1007/978-1-4684-5655-4_8

  • Publisher Name: Springer, Boston, MA

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