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Investigations into the fragmentation and ionization of highly excited La@C-82

Andreas Lassesson (Institutionen för experimentell fysik) ; Kirsten Mehlig ; Andrei Gromov ; A. Taninaka ; H. Shinohara ; Eleanor E B Campbell
Journal of Chemical Physics (0021-9606). Vol. 117 (2002), 21, p. 9811-9817.
[Artikel, refereegranskad vetenskaplig]

We report the first measurements of delayed ionization of the metallofullerene La@C-82. When highly excited in laser desorption, La@C-82 was found to ionize over several microseconds. The rate of delayed ionization of La@C-82 was compared to C-60 under the same extraction conditions, and found to be significantly different. A theoretical model was used for the fitting of the ion signal of the two fullerenes. The metallofullerene results can be fitted well over a time window <30 mus and are consistent with a low ionization potential (6.3 eV) and a high radiative cooling rate. The C-60 data cannot be fitted over the same time window, indicative of an additional time-dependent competing decay channel. (C) 2002 American Institute of Physics.

Nyckelord: ENDOHEDRAL FULLERENES; THERMIONIC EMISSION; DELAYED IONIZATION; BINDING-ENERGY; C-60; PHOTOFRAGMENTATION; MECHANISM; CARBON; ATOM



Denna post skapades 2014-02-06.
CPL Pubid: 193521

 

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Institutionen för experimentell fysik (1900-2005)
Institutionen för fysik (GU) (GU)

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Fysik
Atom- och molekylfysik och optik

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