Hannover 2013 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 25: Interatomic and intermolecular Coulombic decay (contributed for SYCD in A, MO)

MO 25.2: Vortrag

Donnerstag, 21. März 2013, 14:30–14:45, B 302

The role of the partner atom and resonant excitation energy in ICD in rare gas dimers — •Patrick O’Keeffe¹, Paola Bolognesi¹, Marcello Coreno¹, Enrico Ripani¹, Lorenzo Avaldi¹, Michele Devetta², Robert Richter³, Michele Di Fraia³, Carlo Callegari³, Kevin Prince³, Antti Kivimaki⁴, and Michele Alagia⁴ — ¹CNR-IMIP, Area della Ricerca di Roma 1, Italy — ²Dipartimento di Fisica, Università degli Studi di Milano, Milan, Italy — ³Sincrotrone Trieste, Area Science Park, 34149 Trieste, Italy — ⁴CNR-IOM, 34149 Trieste, Italy

This work shows experimental evidence for Interatomic Coulombic Decay (ICD) in mixed rare gas dimers following resonant Auger decay. A modified velocity map imaging apparatus together with a cooled supersonic beam containing Ar₂, ArNe and ArKr dimers was used to record electron VMI images in coincidence with either one or two mass selected ions following excitation of the species on five resonances converging to the Ar⁺ 2p_1/2⁻¹ and 2p_3/2⁻¹ thresholds using the synchrotron radiation of Elettra. The results show that the kinetic energy distribution of the ICD electrons observed in coincidence with the ions from Coulomb explosion of the dimers depends on the partner ion and resonant excitation photon energy.