Abstract
Delayed ionisation of the fullerenes is reported over a timescale of up to 16 µs and compared to the Klots' model for thermionic emission [1]. The laser fluence dependence of the observed time constants for ionisation and the measured dependence on cluster size are in good agreement with model predictions giving strong evidence for the thermionic nature of the ionisation process.
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Note that the delay times reported previously [2] were 0.7 µs too long due to the difference in time between triggering the 308 nm excimer laser and the arrival of the laser pulse in the apparatus. This shift of 0.7 µs does not affect the time constants for ionisation reported in the previous letter.
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Campbell, E.E.B., Ulmer, G. & Hertel, I.V. Thermionic emission from the fullerenes. Z Phys D - Atoms, Molecules and Clusters 24, 81–85 (1992). https://doi.org/10.1007/BF01436607
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DOI: https://doi.org/10.1007/BF01436607