120 citations · 1.2k across the 38 of their papers we have counts for
19 papers · 1 filter
Photoionization time delays probe electron correlations
Mingxuan Li, Huiyong Wang, Rezvan Tahouri +16
The photoelectric effect, explained by Einstein in 1905, is often regarded as a one-electron phenomenon. However, in multi-electron systems, the interaction of the escaping electro…
Probing Instantaneous Single-Molecule Chirality in the Planar Ground State of Formic Acid
D. Tsitsonis, M. Kircher, N. M. Novikovskiy +12
We experimentally demonstrate that individual molecules of formic acid are chiral even when they are in the vibronic ground state, which has a planar equilibrium structure. We ioni…
Role of the Coulomb Potential in Compton Scattering
N. Melzer, M. Kircher, A. Pier +18
We report a fully differential study of ionization of the Ne L-shell by Compton scattering of 20 keV photons. We find two physical mechanisms which modify the Compton-electron emis…
Opportunities for Gas-Phase Science at Short-Wavelength Free-Electron Lasers with Undulator-Based Polarization Control
Markus Ilchen, Enrico Allaria, Primož Rebernik Ribič +44
Free-electron lasers (FELs) are the world's most brilliant light sources with rapidly evolving technological capabilities in terms of ultrabright and ultrashort pulses over a large…
Measuring the photoelectron emission delay in the molecular frame
Jonas Rist, Kim Klyssek, Nikolay M. Novikovskiy +22
If matter absorbs a photon of sufficient energy it emits an electron. The question of the duration of the emission process has intrigued scientists for decades. With the advent of…
Many-electron character of two-photon above-threshold ionization of Ar
I. D. Petrov, B. M. Lagutin, V. L. Sukhorukov +4
The absolute generalized cross sections and angular distribution parameters of photoelectrons for the two-photon above threshold -ionization of Ar were calculated in the exciti…
Rearrangement of electron shells and interchannel interaction in the K photoabsorption of Ne
N. M. Novikovskiy, D. V. Rezvan, N. M. Ivanov +6
A detailed theoretical analysis of the 1s photoionization of neon is presented. It is found that the most significant many-electron correlation in computing photoionization of inne…
Photon-momentum-induced molecular dynamics in photoionization of N at keV
M. Kircher, J. Rist, F. Trinter +16
We investigate K-shell ionization of N at 40 keV photon energy. Using a COLTRIMS reaction microscope we determine the vector momenta of the photoelectron, the Auger electron an…
Recoil-Induced Asymmetry of Nondipole Molecular Frame Photoelectron Angular Distributions in the Hard X-ray Regime
M. Kircher, J. Rist, F. Trinter +15
We investigate angular emission distributions of the 1s-photoelectrons of N ionized by linearly polarized synchrotron radiation at keV. As expected, nondipole contribu…
Strong Differential Photoion Circular Dichroism in Strong-Field Ionization of Chiral Molecules
K. Fehre, S. Eckart, M. Kunitski +14
We investigate the differential ionization probability of chiral molecules in the strong field regime as a function of the helicity of the incident light. To this end, we analyze t…
Chiral photoelectron angular distributions from ionization of achiral atomic and molecular species
Andreas Pier, Kilian Fehre, Sven Grundmann +12
We show that the combination of two achiral components - atomic or molecular target plus a circularly polarized photon - can yield chirally structured photoelectron angular distrib…
Observation of Photoion Backward Emission in Photoionization of He and N2
Sven Grundmann, Max Kircher, Isabel Vela-Perez +14
We experimentally investigate the effects of the linear photon momentum on the momentum distributions of photoions and photoelectrons generated in one-photon ionization in an energ…
Two-photon resonant excitation of interatomic coulombic decay in neon dimers
A Dubrouil, M Reduzzi, M Devetta +21
The recent availability of intense and ultrashort extreme ultraviolet sources opens the possibility to investigate ultrafast electronic relaxation processes in matter in an unprece…
Time-resolved observation of interatomic Coulombic decay induced by two-photon double excitation of Ne
T. Takanashi, N. V. Golubev, C. Callegari +46
The hitherto unexplored two-photon doubly-excited states [Ne()] were experimentally identified using the seeded, fully coherent, intense extreme ultraviolet…
Impact of intense laser pulses on the autoionization dynamics of the 2s2p doubly-excited state of He
Anton N. Artemyev, Lorenz S. Cederbaum, Philipp V. Demekhin
The photoionization of a helium atom by short intense laser pulses is studied theoretically in the vicinity of the doubly-excited state with the intention to investigat…
Observation of enhanced chiral asymmetries in the inner-shell photoionization of uniaxially oriented methyloxirane enantiomers
Maurice Tia, Martin Pitzer, Gregor Kastirke +38
Most large molecules are chiral in their structure: they exist as two enantiomers, which are mirror images of each other. Whereas the rovibronic sublevels of two enantiomers are al…
Photoionization of hydrogen atom by coherent intense high-frequency short laser pulses: Direct propagation of electron wave packets on large spatial grids
Philipp V. Demekhin, David Hochstuhl, Lorenz S. Cederbaum
The time-dependent Schrödinger equation for the hydrogen atom and its interaction with coherent intense high-frequency short laser pulses is solved numerically exactly by propagati…
Dynamic interference of photoelectrons produced by high-frequency laser pulses
Philipp V Demekhin, Lorenz S Cederbaum
The ionization of an atom by a high-frequency intense laser pulse, where the energy of a single-photon is sufficient to ionize the system, is investigated from first principles. It…
Strong interference effects in the resonant Auger decay of atoms induced by intense X-Ray fields
Philipp V Demekhin, Lorenz S. Cederbaum
The theory of resonant Auger decay of atoms in a high intensity coherent X-ray pulse is presented. The theory includes the coupling between the ground state and the resonance due t…