Mainz 2017 – scientific programme
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A: Fachverband Atomphysik
A 26: Poster Session II
A 26.31: Poster
Wednesday, March 8, 2017, 17:00–19:00, P OG1
Strong field dissociation of small heteronuclear molecules into excited fragments — •Sven Meise, Henri Zimmermann, and Ulrich Eichmann — Max-Born-Straße 2a, 12489 Berlin
We investigate the dissociation processes of small molecules in intense short laser fields which yield excited fragments. Recently, experimental coincidence measurements revealed that a fraction of H2−molecules undergoing Coulomb explosion (CE) fragment into an excited H-atom and an proton [1]. The underlying physical process can be understood by applying the semi-classical model of frustrated tunneling ionization (FTI). Here, we present experimental results of strong field dissociation of small heteronuclear molecules (CH4, CO2) into excited fragments which proves that the excitation mechanism (FTI) is not unique to H2 or other homonuclear molecules. Calculations based upon the CE which lead to excited fragments exhibit main features of the experimental results. Further insight is gained by looking at the excited state distribution of the molecular fragments using pulsed field ionization.
B. Manschwetus et al.; PRL 102 113002 (2009)