183 citations · 909 across the 21 of their papers we have counts for
21 papers
Fourfold Differential Photoelectron Circular Dichroism
K. Fehre, N. M. Novikovskiy, S. Grundmann +28
We report on a joint experimental and theoretical study of photoelectron circular dichroism (PECD) in methyloxirane. By detecting O 1s-photoelectrons in coincidence with fragment i…
Closed-loop recycling of rare liquid samples for gas-phase experiments
K. Fehre, M. Pitzer, F. Trinter +4
Many samples of current interest in molecular physics and physical chemistry exist in the liquid phase and are vaporized for the use in gas cells, diffuse gas targets or molecular…
A new route for enantio-sensitive structure determination by photoelectron scattering on molecules in the gas phase
K. Fehre, N. M. Novikovskiy, S. Grundmann +28
X-ray as well as electron diffraction are powerful tools for structure determination of molecules. Studies on randomly oriented molecules in the gas-phase address cases in which mo…
The Stern-Gerlach Experiment Revisited
Horst Schmidt-Böcking, Lothar Schmidt, Hans Jürgen Lüdde +2
The Stern-Gerlach-Experiment (SGE) of 1922 is a seminal benchmark experiment of quantum physics providing evidence for several fundamental properties of quantum systems. Based on t…
Stereochemical configuration and selective excitation of the chiral molecule halothane
Martin Pitzer, Gregor Kastirke, Phillip Burzynski +12
X-ray single-photon ionization and fragmentation of the chiral molecule halothane (CHBrClCF) from a racemic mixture have been investigated using the COLTRIMS (Cold Target R…
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…
Two-particle interference of electron pairs on a molecular level
M. Waitz, D. Metz, J. Lower +19
We investigate the photo-doubleionization of molecules with 400 eV photons. We find that the emitted electrons do not show any sign of two-center interference fringes in thei…
Quasi-molecular electron promotion beyond the 1s and 2p channels in slow collisions of He and He
L. Ph. H. Schmidt, M. S. Schöffler, C. Goihl +3
The electron emission pattern of transfer-ionization in collisions of He with He was investigated for impact velocities between 0.53 a.u. and 0.77 a.u. (7 keV/u - 15 keV/u)…
Agreement at last: an experimental and theoretical study on the single ionization of helium by fast proton impact
H. Gassert, O. Chuluunbaatar, M. Waitz +20
Even though ion/atom-collision is a mature field of atomic physics great discrepancies between experiment and theoretical calculations are still common. Here we present experimenta…
Vortices associated with the wave function of a single electron emitted in slow ion-atom collisions
L. Ph. H. Schmidt, C. Goihl, D. Metz +5
We present measurements and calculations of the momentum distribution of electrons emitted during the ion-atom collision 10 keV/u ,…
Transfer excitation reactions in fast proton-helium collisions
M. S. Schöffler, H. -K. Kim, O. Chuluunbaatar +9
Continuing previous work, we have measured the projectile scattering-angle dependency for transfer excitation of fast protons (300-1200 keV/u) colliding with helium (p+He $\rightar…
Search for isotope effects in projectile and target ionization in swift He on H or D collisions
F. Trinter, M. Waitz, M. S. Schöffler +7
Using the cold target recoil ion momentum spectroscopy (COLTRIMS) technique, we have measured the simultaneous projectile and target ionization in collisions of He projectiles…
Ion impact induced Interatomic Coulombic Decay in neon and argon dimers
H. -K. Kim, H. Gassert, M. S. Schöffler +16
We investigate the contribution of Interatomic Coulombic Decay induced by ion impact in neon and argon dimers (Ne and Ar) to the production of low energy electrons. Our exp…
2D electron momentum distributions for transfer ionization in fast proton Helium collisions
M. S. Schoeffler, O. Chuluunbaatar, S. Houamer +9
The momentum distribution of the electron in the reaction p+He H + He + is measured for projectile energies =300 and 630 keV/u at very small scatterin…
Ejection of quasi-free electron pairs from the helium atom ground state by single photon absorption
M. S. Schöffler, C. Stuck, M. Waitz +14
We investigate single photon double ionization (PDI) of helium at photon energies of 440 and 800 eV. We observe doubly charged ions with close to zero momentum corresponding to ele…
Spatial imaging of the {H_2}^+ vibrational wave function at the quantum limit
L. Ph. H. Schmidt, T. Jahnke, A. Czasch +3
We experimentally obtained a direct image of the nuclear wave functions of {H_2}^+ by dissociating the molecule via electron attachment and determining the vibrational state using…
Otto Stern (1888-1969): The founding father of experimental atomic physics
J. Peter Toennies, Horst Schmidt-Böcking, Bretislav Friedrich +1
We review the work and life of Otto Stern who developed the molecular beam technique and with its aid laid the foundations of experimental atomic physics. Among the key results of…
Single photon double ionization of the helium dimer
T. Havermeier, T. Jahnke, K. Kreidi +16
We show that a single photon can ionize the two helium atoms of the helium dimer in a distance up to 10 °A. The energy sharing among the electrons, the angular distributions of the…
Interatomic Coulombic Decay following Photoionization of the Helium Dimer: Observation of Vibrational Structure
T. Havermeier, T. Jahnke, K. Kreidi +15
Using synchrotron radiation we simultaneously ionize and excite one helium atom of a helium dimer (He_2) in a shakeup process. The populated states of the dimer ion (i.e. He^[*+](n…
Fragmentation dynamics of CO23+ investigated by multiple electron capture in collisions with slow highly charged ions
N. Neumann, D. Hant, L. Ph. H. Schmidt +8
Fragmentation of highly charged molecular ions or clusters consisting of more than two atoms can proceed in an onestep synchronous manner where all bonds break simultaneously or se…
How Time Works in Quantum Systems: Overview of time ordering and time correlation in weakly perturbed atomic collisions and in strongly perturbed qubits
J. H. McGuire, L. Kaplan, Kh. Kh. Shakov +5
Time ordering may be defined by first defining the limit of no time ordering (NTO) in terms of a time average of an external interaction, V(t). Previously, time correlation was def…