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Berlin 2014 – scientific programme

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A: Fachverband Atomphysik

A 51: Interaction with VUV and X-ray light III

A 51.5: Talk

Friday, March 21, 2014, 11:30–11:45, BEBEL E42

Diffraction Effects in the Molecular-Frame Photoelectron Angular Distributions of Halomethanes. — •Cedric Bomme1, Denis Anielski1,2, Sadia Bari1, Benjamin Erk1, Rebecca Boll1,2, Evgeny Savelyev1, Jens Kienitz1, Nele Mueller1, Thomas Kierspel1, Sebastian Trippel1, Jochen Kuepper1, Jens Viefhaus1, Mauro Stener3, Piero Decleva3, and Daniel Rolles11Deutsches Elektronen-Synchrotron(DESY), Hamburg, Germany. — 2Max-Planck-Institut f. Kernphysik, Heidelberg, Germany. — 3Universita' di Trieste, Trieste, Italy

We have measured the molecular-frame photoelectron angular distributions (MFPADs) for inner-shell photoionization of the halomethanes CH3F, CH3I, and CF3I in the gas-phase. Using our new double-sided velocity map imaging (VMI) spectrometer optimized for electron-ion coincidence measurements of high-kinetic energy electrons, we are able to determined MFPADs for photoelectrons up to 300 eV. For these high kinetic energies, the MFPADs are dominated by diffraction effects that encode information on the molecular geometry in the MFPADs.

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