Eur. Phys. J. D 34, 151-155 (2005)
https://doi.org/10.1140/epjd/e2005-00109-6

Time-dependent spectrum of thermionic emission from hot C

Laboratoire de Spectrométrie Ionique et Moléculaire, CNRS UMR N° 5579 et Université Lyon I, Bât. Kastler 43, boulevard du 11 novembre 1918, 69622 Villeurbanne Cedex, France

Corresponding author: ^a bordas@lasim.univ-lyon1.fr

Received: 6 September 2004
Published online: 13 July 2005

Abstract

Experimental measurements of time-dependent photoelectron spectra observed in thermionic emission of hot C₆₀ excited by multiphoton absorption are presented. Time resolved velocity-map imaging is used to record photoelectron spectra and to disentangle direct and delayed processes. The evolution of the kinetic energy distribution of thermal electrons as a function of the delay after multiphoton excitation is described within the general formalism of the detailed balance theory. Experimental spectra obtained in the near-UV are in excellent agreement with the assumption of thermal equilibrium.