14.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR1.6k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR1.4k papers
- Heidelberg UniversityDE1.3k papers
- Max Planck SocietyDE1.1k papers
- University of ZurichCH1.1k papers
- European Organization for Nuclear ResearchCH1k papers
- Laboratoire de Physique Nucléaire et de Hautes ÉnergiesFR990 papers
- Institute of Nuclear Physics, Polish Academy of SciencesPL973 papers
- University of Maryland, College ParkUS940 papers
- Rutherford Appleton LaboratoryGB939 papers
- Institute for Nuclear ResearchRU922 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT912 papers
22 papers · 2 filters
Storage-ring measurement of the hyperfine-induced 2s 2p 3P0 -> 2s2 1S0 transition rate in beryllium-like sulfur
S. Schippers, D. Bernhardt, A. Müller +8
The hyperfine induced 2s 2p 3P0 -> 2s2 1S0 transition rate in Be-like sulfur was measured by monitoring the decay of isotopically pure beams of 32-S12+ and 33-S12+ ions in a heavy-…
Macroscopic aspects of relativistic x-ray assisted high-order harmonic generation
Markus C. Kohler, Karen Z. Hatsagortsyan
A theoretical model is developed describing high-order harmonic generation (HHG) from a gas of multiply-charged ions driven by a laser field of relativistic intensity. Macroscopic…
Electron correlation and interference effects in strong-field processes
Markus C. Kohler, Carsten Müller, Christian Buth +5
Several correlation and interference effects in strong-field physics are investigated. We show that the interference of continuum wave packets can be the dominant mechanism of high…
Nuclear Shape Effect on the g Factor of Hydrogenlike Ions
J. Zatorski, N. S. Oreshkina, C. H. Keitel +1
The nuclear shape correction to the g factor of a bound electron in 1S-state is calculated for a number of nuclei in the range of charge numbers from Z=6 up to Z=92. The leading re…
The trap design of PENTATRAP
C. Roux, Ch. Böhm, A. Dörr +7
A novel Penning trap tower consisting of five compensated cylindrical Penning traps is developed for the PENTATRAP mass spectrometer at the Max-Planck-Institut für Kernphysik in He…
PENTATRAP: A novel cryogenic multi-Penning trap experiment for high-precision mass measurements on highly charged ions
J. Repp, Ch. Böhm, J. R. Crespo López-Urrutia +9
The novel five-Penning trap mass spectrometer PENTATRAP is developed at the Max-Planck-Institut für Kernphysik (MPIK), Heidelberg. Ions of interest are long-lived highly charged nu…
Collectively enhanced resonant photoionization in a multi-atom ensemble
Carsten Müller, Mihai A. Macovei, Alexander B. Voitkiv
Photoionization of an atom via interatomic correlations to N neighboring atoms may be strongly enhanced due to constructive interference of quantum pathways. The ionization proceed…
Coulomb focusing at above-threshold ionization in elliptically polarized mid-infrared strong laser fields
Chengpu Liu, Karen Z. Hatsagortsyan
The role of Coulomb focusing in above-threshold ionization in an elliptically polarized mid-infrared strong laser field is investigated within a semiclassical model incorporating t…
Overlapping resonances in nuclei coupling to the atomic shells
Srinivas K. Arigapudi, Adriana Pálffy
The resonant process of nuclear excitation by electron transition (NEET) in highly charged ions is investigated. In NEET, a bound electronic decay transition occurs with the simult…
Storage-ring ionization and recombination experiments with multiply charged ions relevant to astrophysical and fusion plasmas
Stefan Schippers
Past and ongoing research activities at the Heidelberg heavy-ion storage-ring TSR are reviewed which aim at providing accurate absolute rate coefficients and cross sections of atom…
Assignment of resonances in dissociative recombination of HD+ ions: high-resolution measurements compared with accurate computations
F. O. Waffeu Tamo, H. Buhr, O. Motapon +16
The collision-energy resolved rate coefficient for dissociative recombination of HD+ ions in the vibrational ground state is measured using the photocathode electron target at the…
QED theory of the nuclear magnetic shielding in hydrogen-like ions
V. A. Yerokhin, K. Pachucki, Z. Harman +1
The shielding of the nuclear magnetic moment by the bound electron in hydrogen-like ions is calculated ab initio with inclusion of relativistic, nuclear, and quantum electrodynamic…
Carrier-envelope phase sensitive inversion in two-level systems
Christian Jirauschek, Lingze Duan, Oliver D. Mücke +3
We theoretically study the carrier-envelope phase dependent inversion generated in a two-level system by excitation with a few-cycle pulse. Based on the invariance of the inversion…
Nuclear effects in atomic transitions
Adriana Pálffy
Atomic electrons are sensitive to the properties of the nucleus they are bound to, such as nuclear mass, charge distribution, spin, magnetization distribution, or even excited leve…
Observation of Spin Flips with a Single Trapped Proton
S. Ulmer, C. C. Rodegheri, K. Blaum +4
Radio-frequency induced spin transitions of one individual proton are observed for the first time. The spin quantum jumps are detected via the continuous Stern-Gerlach effect, whic…
Young-type interference in projectile-electron loss in energetic ion-molecule collisions
A. B. Voitkiv, B. Najjari, D. Fischer +2
Under certain conditions an electron bound in a fast projectile-ion, colliding with a molecule, interacts mainly with the nuclei and inner shell electrons of atoms forming the mole…
Resonant two-photon single ionization of two atoms
C. Müller, A. B. Voitkiv
Resonant two-photon ionization in a system consisting of two spatially well-separated atoms is studied. Due to two-center electron-electron correlations, the ionization may also pr…
Comment on "Missing Transverse-Doppler Effect in Time-Dilation Experiments with High-Speed Ions"
G. Saathoff, S. Reinhardt, R. Holzwarth +14
In an article "Missing Transverse-Doppler Effect in Time-Dilation Experiments with High-Speed Ions" by S. Devasia [arXiv:1003.2970v1], our recent Doppler shift experiments on fast…
Attochirp-free High-order Harmonic Generation
Markus C. Kohler, Christoph H. Keitel, Karen Z. Hatsagortsyan
A method is proposed for arbitrarily engineering the high-order harmonic generation phase achieved by shaping a laser pulse and employing xuv light or x rays for ionization. This r…
Theory of attosecond transient absorption spectroscopy of strong-field-generated ions
Robin Santra, Vladislav S. Yakovlev, Thomas Pfeifer +1
Strong-field ionization generally produces ions in a superposition of ionic eigenstates. This superposition is generally not fully coherent und must be described in terms of a dens…
Calibration of the ISOLDE acceleration voltage using a high-precision voltage divider and applying collinear fast beam laser spectroscopy
A. Krieger, Ch. Geppert, R. Catherall +9
A high-voltage divider with accuracy at the ppm level and collinear laser spectroscopy were used to calibrate the highvoltage installation at the radioactive ion beam facility ISOL…
Dielectronic recombination of xenonlike tungsten ions
S. Schippers, D. Bernhardt, A. Müller +8
Dielectronic recombination (DR) of xenonlike W20+ forming W19+ has been studied experimentally at a heavy-ion storage-ring. A merged-beams method has been employed for obtaining ab…