The 3 2 power law for high order multiphoton processes

Shammai Speiser*, Joshua Jortner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We present an analysis of the intensity (I) dependence of the experimental multiphoton photodissociation probability ((Γ)) for a conical geometry of the laser beam, incorporating saturation effects. For laser intensities in the focal region which exceed the critical intensity for the onset of saturation the (Γ) ∫ I 3 2 law holds over a broad intensity range, masking the order of the quantum process. Experimental conditions for the conical geometry which will result in information concerning the order of the multiphoton process are discussed.

Original languageEnglish
Pages (from-to)399-403
Number of pages5
JournalChemical Physics Letters
Issue number3
StatePublished - 15 Dec 1976
Externally publishedYes


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