Europhys. Lett, 47 (3), pp. 384-390 (1999)
Determination of the electron temperature in the thermal spike of amorphous carbon
G. Schiwietz 1, G. Xiao 1, P. L. Grande 2,
E. Luderer 1
R. Pazirandeh 1 and U. Stettner 1
Glienicker Str. 100, 14109 Berlin, Germany
2 Instituto de Física, Universidade Federal do Rio Grande do Sul
91500 Porto Alegre, Brazil
(received 15 February 1999; accepted in final form 7 June 1999)
PACS. 79.20-m - Impact phenomena (including electron spectra and sputtering).
PACS. 61.80Jh - Ion radiation effects.
PACS. 72.15Cz - Electrical and thermal conduction in amorphous and liquid metals and alloys.
The target KVV Auger-electron emission has been investigated experimentally
and theoretically for heavy-ion irradiation of amorphous carbon at an ion
velocity of 14.1 atomic units (5 MeV/u). We present experimental evidence
for an influence of the target
excitation density on the shape of carbon Auger-electron spectra for O7+, Kr17+ and Kr30+ ions. An analysis of the Auger structures allows for the first time to extract electron temperatures at the center of nuclear tracks and comparison is made with results of two thermal-spike models.
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