期刊
出版社
ELSEVIER
DOI: 10.1016/j.nimb.2004.05.041
关键词
electron temperature; ion-track potential; multiple ionization; neutralization; recombination; auger decay; electron spectra
The energy dissipation and femtosecond dynamics due to fast heavy ions in matter is critically reviewed with emphasis on possible mechanisms that lead to material modifications. Starting from a discussion of the initial electronic energy-deposition processes, three basic mechanisms for the conversion of electronic into atomic energy are investigated by means of Auger-electron spectroscopy. Results for amorphous Si, amorphous C and polypropylene are presented and discussed. Experimental evidence for a highly charged track region as well as for hot electrons inside tracks is shown. As follows mainly from Auger-electron spectroscopy, there are strong indications for different track-production mechanisms in different materials. (C) 2004 Elsevier B.V. All rights reserved.
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