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Issue 11, 2001
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Multiphoton photoelectron spectroscopy: watching molecules dissociate

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Threshold photoionization spectroscopy [zero kinetic energy (ZEKE), pulsed field ionization (PFI), mass analysed threshold ionisation (MATI)] usually takes advantage of multip hoton excitation through bound intermediate states, but we show that excellent quality, high-resolution spectra can also be obtained in one-color experiments using two- and three-photon ionization. An enhancement similar to resonance Raman yields changed spectra if the excitation proceeds [italic v (to differentiate from Times ital nu)]ia continuous intermediate states. A molecule which after absorbing a photon started to dissociate is stabilized on the ionic surface by a delayed second photon, with the observed spectra reflecting geometry changes due to this arrested dissociation process. Using two colors, the technique should be applicable to almost any molecule, and yield a detailed insight into its dissociation dynamics.

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Publication details

The article was received on 26 Mar 2001, accepted on 12 Apr 2001 and first published on 10 May 2001

Article type: Communication
DOI: 10.1039/B102772G
Citation: Phys. Chem. Chem. Phys., 2001,3, 1942-1944

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    Multiphoton photoelectron spectroscopy: watching molecules dissociate

    B. Urban and V. E. Bondybey, Phys. Chem. Chem. Phys., 2001, 3, 1942
    DOI: 10.1039/B102772G

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