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Photo-thermo-dissociation. I - A general mechanism for destroying molecules (1989)

D'Hendecourt, L. ; Desert, F. X. ; Leger, A. ; [et al.]

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Publication Date: 2011-08-19

Description: Photothermodissociation (PTD) of an isolated molecule is the name of the process when a photon is absorbed by an electronic transition, the energy is transferred to the vibrations (hot molecule) and then an atom or a fragment is ejected. A statistical physics treatment is presented that goes beyond the thermal approximation and fully takes into account the isolation of the system. A model is given that permits an explicit calculation of the ejection rates of hydrogen and carbon fragments from aromatic molecules as a function of their size and internal energy. Then, the lifetime of species against PTD in different astronomical radiation fields will result when a precise dynamical evolution of their internal energy can be established.

Keywords: ASTROPHYSICS

Type: Astronomy and Astrophysics (ISSN 0004-6361); 213; 1-2,

Format: text

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