Incubation times in the multiphoton dissociation of polyatomic molecules

Giora Yahav*, Yehuda Haas, Benny Carmeli, Abraham Nitzan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The incubation period revealed in the multiphoton dissociation of molecules by intense infrared lasers is discussed. It is found experimentally that large excess of added foreign gas affects the incubation period to a much smaller degree than the overall yield. A rate equations model is presented, including both the laser intensity and collisional effects. Exact numerical solution is compared with a simple analytical approximation, based on the passage time moments method. Agreement with experimental results is quite satisfactory, indicating that the role of collisions in the case discussed (tetramethyldioxetane dissociation) is primarily vibrational relaxation of excited molecules.

Original languageEnglish
Pages (from-to)3410-3415
Number of pages6
JournalThe Journal of Chemical Physics
Issue number5
StatePublished - 1979


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