2.4k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Max Planck SocietyDE178 papers
- Freie Universität BerlinDE80 papers
- Centre National de la Recherche ScientifiqueFR67 papers
- University of the Basque CountryES53 papers
- Technische Universität BerlinDE51 papers
- Goethe University FrankfurtDE42 papers
- Deutsches Elektronen-Synchrotron DESYDE39 papers
- Humboldt-Universität zu BerlinDE37 papers
- Material Physics CenterES36 papers
- Max Planck Institute for the Structure and Dynamics of MatterDE35 papers
- Technical University of MunichDE31 papers
- Lawrence Berkeley National LaboratoryUS30 papers
92 papers · 1 filter
The influence of the binding energy on Compton-scattering-driven ionization
N. Melzer, M. Kircher, G. Kastirke +31
We present a comprehensive study of Compton scattering of 20 keV photons by bound electrons over a wide range of binding energies (Ne 2p, Ne 2s, C 1s, O 1s, and Ne 1s orbitals). In…
Selective Bond Breaking in CO Induced by Photoelectron Recoil
J. Weiherer, N. Melzer, M. Kircher +16
After core-ionization of CO, typically an Auger-Meitner decay takes place, leading to the formation of a dicationic molecule that may dissociate into CO and O. We demon…
Magneto-optical trapping of aluminum monofluoride
J. E. Padilla-Castillo, J. Cai, P. Agarwal +6
Magneto-optical trapping of molecules has thus far been restricted to molecules with electronic ground states. These species are chemically reactive and only support a simple…
Double--hole resonances in single photoionization of He-like B ions
A. Müller, P. -M. Hillenbrand, S. -X. Wang +8
Within a joint experimental and theoretical research project, single photoionization of He-like B ions was investigated in the energy range from approximately 250 to 1200~eV…
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…
Understanding inner-shell excitations in molecules through spectroscopy of the 4f hole states of YbF
S. Popa, S. Schaller, A. Fielicke +4
Molecules containing a lanthanide atom have sets of electronic states arising from excitation of an inner-shell electron. These states have received little attention, but are thoug…
Comprehensive peak-width analysis in matter-wave diffraction under grazing incidence conditions
Lee Yeong Kim, Do Won Kang, Jong Chan Lee +3
Thermal energy atom scattering at a surface with grazing incidence conditions is an innovative method for investigating dispersive atom-surface interactions with potential applicat…
Hyperfine structure and isotope shifts of the transition in atomic zinc
David Röser, J. Eduardo Padilla-Castillo, Ben Ohayon +5
We report absolute frequency, isotope shift, radiative lifetime and hyperfine structure measurements of the (213.8 nm) transition in Zn I using a cryog…
Vibrationally Resolved Inner-Shell Photoexcitation of the Molecular Anion C
S. Schippers, P. -M. Hillenbrand, A. Perry-Sassmannshausen +6
Carbon core-hole excitation of the molecular anion C has been experimentally studied at high resolution by employing the photon-ion merged-beams technique at a synchrotr…
Ion-atom-atom three-body recombination: from the cold to the thermal regime
Marjan Mirahmadi, Jesús Pérez-Ríos
We present a study on ion-atom-atom reaction A+A+B in a wide range of systems and collision energies ranging from 100K to 10K, analyzing the two possible products: mol…
High-resolution isotope-shift spectroscopy of Cd I
Simon Hofsäss, J. Eduardo Padilla-Castillo, Sid C. Wright +6
We present absolute frequency measurements of the (nm) and (nm) transitions…
Cryogenic Buffer Gas beams of AlF, CaF, MgF, YbF, Al, Ca, Yb and NO -- a comparison
Sidney C. Wright, Maximilian Doppelbauer, Simon Hofsäss +4
Cryogenic buffer gas beams are central to many cold molecule experiments. Here, we use absorption and fluorescence spectroscopy to directly compare molecular beams of AlF, CaF, MgF…
Isotope Shifts in Cadmium as a Sensitive Probe for Physics Beyond the Standard Model
B. Ohayon, S. Hofsäss, J. E. Padilla-Castillo +5
Isotope shifts (ISs) in atomic energy levels are sensitive probes of nuclear structure and new physics beyond the Standard Model. We present an analysis of the ISs of the cadmium a…
Multiple Photodetachment of Oxygen Anions via K-Shell Excitation and Ionization: Direct Double-Detachment Processes and Subsequent Deexcitation Cascades
S. Schippers, A. Hamann, A. Perry-Sassmannshausen +6
Experimental cross sections for m-fold photodetachment (m=2-5) of oxygen anions via K-shell excitation and ionization were measured in the photon-energy range of 525-1500 eV using…
Ion-atom-atom three-body recombination in cold hydrogen and deuterium plasmas
Miruna T. Cretu, Marjan Mirahmadi, Jesús Pérez-Ríos
We present a detailed study about ion-atom-atom three-body recombination in hydrogen and deuterium plasmas based on classical trajectory calculations in hyperspherical coordinates.…
New Measurement Resolves Key Astrophysical Fe XVII Oscillator Strength Problem
Steffen Kühn, Charles Cheung, Natalia S. Oreshkina +19
One of the most enduring and intensively studied problems of X-ray astronomy is the disagreement of state-of-the art theory and observations for the intensity ratio of two Fe XVII…
Hyperfine resolved optical spectroscopy of the AX transition in MgF
M. Doppelbauer, S. C. Wright, S. Hofsäss +3
We report on hyperfine-resolved laser spectroscopy of the AX transition of MgF, relevant for laser cooling. We recorded 25 rotational transitions with an abs…
Multiple photodetachment of silicon anions via K-shell excitation and ionization
A. Perry-Sassmannshausen, T. Buhr, M. Martins +5
Experimental cross sections for -fold photodetachment () of silicon anions via -shell excitation and ionization were measured in the photon-energy range of 1830-1900 e…
Ion and Electron Momentum Distributions from Single and Double Ionization of Helium Induced by Compton Scattering
M. Kircher, F. Trinter, S. Grundmann +18
We present the momentum distributions of the nucleus and of the electrons from double ionization of the helium atom by Compton scattering of photons with keV. We find that…
Observation of Chemical Reactions between a Trapped Ion and Ultracold Feshbach Dimers
H. Hirzler, R. S. Lous, E. Trimby +3
We measure chemical reactions between a single trapped Yb ion immersed in an ultracold bath of Li atoms containing trace amounts of Li dimers. This produces LiY…
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…
High-Energy Molecular-Frame Photoelectron Angular Distributions: A Molecular Bond-Length Ruler
Isabel Vela-Peréz, Fukiko Ota, Abir Mhamdi +24
We present an experimental and theoretical study of core-level ionization of small hetero- and homo-nuclear molecules employing circularly polarized light and address molecular-fra…
Electric field dissociation of weakly bound molecular ions
Jesús Pérez-Ríos
We present a full quantal study on the dissociation of a weakly bound molecular ion in the presence of an external time-dependent electric field. We focus on the dissociation dynam…
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…