APS » PROLA » Phys. Rev. Lett. » Volume 79 » Issue 26

Phys. Rev. Lett. 79, 5234 - 5237 (1997)

Infrared Resonance Enhanced Multiphoton Ionization of Fullerenes
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G. von Helden1, I. Holleman1, G. M. H. Knippels2, A. F. G. van der Meer2, and G. Meijer1
1Department of Molecular and Laser Physics, University of Nijmegen, Toernooiveld, NL-6525 ED Nijmegen, The Netherlands
2FOM-Institute for Plasma Physics Rijnhuizen, Edisonbaan 14, NL-3430 BE Nieuwegein, The Netherlands

Received 28 July 1997

Gas-phase fullerenes are resonantly heated by a train of high power subpicosecond pulses from a free electron laser (FEL) to internal energies at which they efficiently undergo delayed ionization. When the laser is tuned from 6–20 μm while the amount of laser produced parent ions is recorded, resonant absorption of 200–600 IR photons, resulting in almost fragmentation-free ion spectra, is observed. Infrared resonance enhanced multiphoton ionization with a FEL is shown to enable extremely sensitive IR spectroscopy with mass selective detection of gas-phase fullerenes.


©1997 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v79/p5234
DOI: 10.1103/PhysRevLett.79.5234
PACS: 36.40.Vz, 33.20.Ea, 33.80.Rv

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