Volume 47, Number 3, August I 1999
|Page(s)||384 - 390|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Determination of the electron temperature in the thermal spike of amorphous carbon
Hahn-Meitner-Institut, Bereich Festkörperphysik Glienicker Str. 100, 14109 Berlin, Germany
2 Instituto de Física, Universidade Federal do Rio Grande do Sul 91500 Porto Alegre, Brazil
Accepted: 7 June 1999
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.
PACS: 79.20.-m – Impact phenomena (including electron spectra and sputtering) / 61.80.Jh – Ion radiation effects / 72.15.Cz – Electrical and thermal conduction in amorphous and liquid metals and alloys
© EDP Sciences, 1999
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