Time-resolved studies of electron-phonon relaxation in metals using a free-electron laser

Time-resolved studies of electron-phonon relaxation in metals using a free-electron laser

Here we report recent experiments on ion emission from metals (Ti, Nb, Mg) using a free-electron laser that delivers a train of subpicosecond micropulses in the mid-infrared (IR). The laser intensities for the surface damage and ion emission thresholds are used as markers for the onset of energy tra...

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Veröffentlicht in:Applied surface science 1999-06, Vol.154-155, p.172-178
Hauptverfasser: Satta, M, Ermer, D R, Papantonakis, M R, Flamini, C, Haglund, R F, Mele, A
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container_title Applied surface science
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creator Satta, M
Ermer, D R
Papantonakis, M R
Flamini, C
Haglund, R F
Mele, A
description Here we report recent experiments on ion emission from metals (Ti, Nb, Mg) using a free-electron laser that delivers a train of subpicosecond micropulses in the mid-infrared (IR). The laser intensities for the surface damage and ion emission thresholds are used as markers for the onset of energy transfer to the lattice for ablation. Numerical calculations based on the Anisimov two-temperature model are used to evaluate the electron temperature T sub e and the lattice temperature T sub i . The results are discussed in terms of the Hertz-Knudsen equation for vaporization and a model based on laser-induced multiple electronic transitions.
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title Time-resolved studies of electron-phonon relaxation in metals using a free-electron laser
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