Berlin 2005 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

MO: Molekülphysik

MO 31: Ultrafast Photochemistry

MO 31.2: Talk

Monday, March 7, 2005, 10:45–11:00, HU 2091

Ionization and Fragmentation of C60 Fullerenes Exposed to Intense Laser Radiation with a Pulse Duration down to 9 fs — •I. Shchatsinin, G. Stibenz, G. Steinmeyer, T. Laarmann, C.P. Schulz, and I.V. Hertel — Max-Born-Institut, Max-Born-Str. 2a, D-12489 Berlin, Germany

Fullerenes are interesting model systems for studying the dynamics of ionisation and energy coupling in large but finite systems with many degrees of freedom. We have investigated the photo excitation and ionisation of C₆₀ fullerenes with intense fs laser radiation. Ultrashort pulses with a duration of about 9 fs and an intensity up to 5 × 10¹⁴ W/cm² have been focused on the molecular beam. From a detailed analysis of the resulting time-of-flight mass spectra as a function of important laser parameters, i.e. pulse duration and intensity, a deep insight into the ionisation and fragmentation processes can be obtained. The derived saturation intensities for C₆₀⁺, C₆₀²⁺ and C₆₀³⁺ will be discussed in the light of different theoretical models.