Details

Autor(en) / Beteiligte

• Hollstein, M
• Mertens, K
• Klumpp, S
• Gerken, N
• Palutke, S
• Baev, I
• Brenner, G
• Dziarzhytski, S
• Meyer, M
• Wurth, W
• Pfannkuche, D
• Martins, M

Titel

Ultrafast charge redistribution in small iodine containing molecules

Ist Teil von

• New journal of physics, 2019-03, Vol.21 (3), p.33017

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2019

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• We present studies on intra-molecular charge redistribution in iodine containing molecules upon iodine-4d photoionization. For this, we employed an XUV-pump-XUV-probe scheme based on time-delayed femtosecond pulses delivered by the free-electron laser at DESY in Hamburg (FLASH). The experimental results show delay dependent and molecule-specific iodine charge state distributions that arise upon multiple iodine-4d photoionization. Using the example of CH3I and CH2I2, we compare the delay-dependent yields of I3+. We model the involved processes using advanced ab initio electronic structure calculations which include electron correlations combined with a classical model of the nuclear motion. The qualitative agreement of our model with the experimental results allows us to relate the observed, strongly molecule-specific efficiencies of the intra-molecular charge rearrangement not only to molecule-specific fragmentation timescales but also to molecule-specific electronic structure and molecular environment.