Abstract
A theory of explosive desorption observed by Chuang and Domen is developed. Adsorbate molecules are excited by a UV laser to higher electron states. The electronic energy is converted to the low-frequency vibronic states. Excited vibronic state interacting with crystal vibrations lead to the phonon “avalanche”. This causes non-selective molecular desorption. A main result of the present theory is the fluence- and coverage-dependent threshold conditions.
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