Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 25: Poster Session I
A 25.47: Poster
Dienstag, 6. März 2018, 16:15–18:15, Redoutensaal
Strong-field induced nuclear dynamics in C60 traced via time-resolved X-ray scattering at LCLS — •Sven Augustin1, Kirsten Schnorr1, Georg Schmid1, Hannes Lindenblatt1, Robert Moshammer1, Arnaud Rouzée2, Marc Vrakking2, Claus-Peter Schulz2, and Thomas Pfeifer1 for the ImagingC60@LCLS collaboration — 1Max-Planck-Institut für Kernphysik, Heidelberg — 2Max-Born-Institut, Berlin
Time-resolved X-ray scattering images and time-of-flight spectra of NIR (800 nm) laser-excited C60 molecules have been recorded employing the LAMP instrument at AMO/LCLS. Using a pnCCD detector, in average 100 photons scattered off C60 have been detected per 1.8 keV X-ray pulse.
Different dynamics have been observed as the NIR laser intensity was varied: For higher intensities, the scattering signal vanishes within less than 100 femtoseconds indicating complete disintegration (i.e., Coulomb explosion) of the fullerenes. In addition, a fast symmetric shrinking of the circular scattering patterns has been found, from which the time scale of the molecular expansion can be determined to be roughly 100 femtoseconds. For lower intensities, more complex variations of the size of the scattering pattern on longer time scales (up to picoseconds) have been observed.