THERMIONIC EMISSION FROM FULLERENES
- 1 December 1992
- journal article
- research article
- Published by World Scientific Pub Co Pte Ltd in International Journal of Modern Physics B
- Vol. 06 (23n24) , 3881-3891
- https://doi.org/10.1142/s0217979292001961
Abstract
Fullerenes in the gas phase, excited by a pulsed laser, exhibit thermionic emission. We analyze the time dependence of the ion yield of C n + in a mass spectrometer. By pulsing the extraction field of the ion lens, we are able to observe delayed ions formed as late as 50 µs after excitation by the 2nd, 3rd or 4th harmonic of a Q-switched YAG laser. The enhanced sensitivity of this new technique allows us to detect delayed ions not only from excited C 60 and C 70, but from all other even-sized clusters in the size range 36≤ n ≤70. Our results do not confirm the assertion that thermionic emission from C 60 and C 70 can be characterized by just 2 or 3 distinct rate constants.Keywords
This publication has 0 references indexed in Scilit: