Skip to Main content Skip to Navigation

Etude des mécanismes de désexcitation de C60 : ionisation retardée et émission C2

Abstract : This thesis is dedicated to the study of C60 fullerene cooling mechanisms after a nanosecond laser excitation. In this temporal mode, absorbed energy is redistributed to all cluster's degrees of freedom causing a fragmentation cascade by emission of C2 molecules. A process of delayed ionisation is highlighted for each size of produced clusters. Then the formed cations can fragment by emission of C2. Our experimental device is made of a time-resolved velocity-map imaging spectrometer combined with a Wiley-McLaren time-of-flight mass spectrometer. It allows extracting the kinetic energy spectra from the photoelectrons or photoions that result from the C60 relaxation chain. These spectra are compared with a statistical model based on Weisskopf's formalism. A Monte Carlo algorithm was developed in order to rebuild the C60 time-of-flight spectrum. The information extracted from simulations, like the internal energies or the branching ratios at each decay stage, perfectly complete the analysis of the involved processes.
Complete list of metadata

Cited literature [30 references]  Display  Hide  Download
Contributor : Bruno Climen <>
Submitted on : Tuesday, September 12, 2006 - 1:17:27 PM
Last modification on : Thursday, October 15, 2020 - 9:00:22 AM
Long-term archiving on: : Monday, April 5, 2010 - 11:37:34 PM


  • HAL Id : tel-00092829, version 1



Bruno Climen. Etude des mécanismes de désexcitation de C60 : ionisation retardée et émission C2. Physique Atomique [physics.atom-ph]. Université Claude Bernard - Lyon I, 2006. Français. ⟨tel-00092829⟩



Record views


Files downloads