J. Ullrich

24.0k total citations · 3 hit papers
272 papers, 11.9k citations indexed

About

J. Ullrich is a scholar working on Atomic and Molecular Physics, and Optics, Spectroscopy and Radiation. According to data from OpenAlex, J. Ullrich has authored 272 papers receiving a total of 11.9k indexed citations (citations by other indexed papers that have themselves been cited), including 242 papers in Atomic and Molecular Physics, and Optics, 118 papers in Spectroscopy and 72 papers in Radiation. Recurrent topics in J. Ullrich's work include Atomic and Molecular Physics (180 papers), Mass Spectrometry Techniques and Applications (115 papers) and Laser-Matter Interactions and Applications (81 papers). J. Ullrich is often cited by papers focused on Atomic and Molecular Physics (180 papers), Mass Spectrometry Techniques and Applications (115 papers) and Laser-Matter Interactions and Applications (81 papers). J. Ullrich collaborates with scholars based in Germany, United States and China. J. Ullrich's co-authors include R. Moshammer, Alexander Dorn, R. Dörner, H. Schmidt‐Böcking, V. Mergel, O. Jagutzki, L. Spielberger, J. R. Crespo López-Urrutia, B. Feuerstein and L. Ph. H. Schmidt and has published in prestigious journals such as Science, Physical Review Letters and Nature Communications.

In The Last Decade

J. Ullrich

268 papers receiving 11.4k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Recoil-ion and electron momentum spectroscopy: reaction-microscopes

2003 1.4k citations J. Ullrich, R. Moshammer et al. profile →
Cold Target Recoil Ion Momentum Spectroscopy: a ‘momentum microscope’ to view atomic collision dynamics

2000 1.0k citations R. Dörner, V. Mergel et al. profile →
Attosecond tracing of correlated electron-emission in non-sequential double ionization

2012 197 citations O. Herrwerth, Arne Senftleben et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
J. Ullrich Germany	54	10.7k	5.1k	2.2k	1.5k	1.5k	272	11.9k
R. Moshammer Germany	55	10.8k 1.0×	5.3k 1.0×	2.5k 1.2×	1.5k 1.0×	1.3k 0.9×	237	11.6k
C. D. Lin United States	64	15.7k 1.5×	5.6k 1.1×	2.5k 1.2×	1.6k 1.1×	1.5k 1.0×	459	16.7k
P. H. Bucksbaum United States	57	9.4k 0.9×	3.0k 0.6×	1.6k 0.7×	720 0.5×	765 0.5×	208	11.0k
Marc J. J. Vrakking Germany	54	10.0k 0.9×	4.2k 0.8×	1.4k 0.6×	541 0.4×	618 0.4×	238	10.6k
Christian Spielmann Germany	47	10.5k 1.0×	1.8k 0.3×	3.1k 1.4×	673 0.4×	1.2k 0.8×	200	12.1k
D. M. Villeneuve Canada	70	16.0k 1.5×	6.7k 1.3×	2.9k 1.3×	327 0.2×	1.4k 0.9×	243	16.8k
Misha Ivanov Germany	65	22.1k 2.1×	7.8k 1.5×	4.2k 2.0×	456 0.3×	1.1k 0.8×	271	22.7k
H. Pépin Canada	35	5.2k 0.5×	1.4k 0.3×	3.2k 1.5×	505 0.3×	2.7k 1.8×	186	7.1k
J. R. Crespo López-Urrutia Germany	43	4.9k 0.5×	1.7k 0.3×	1.2k 0.6×	928 0.6×	1.1k 0.8×	211	5.6k
G. G. Paulus Germany	55	10.4k 1.0×	3.8k 0.8×	2.6k 1.2×	353 0.2×	1.0k 0.7×	265	11.1k

Countries citing papers authored by J. Ullrich

Since Specialization

Citations

This map shows the geographic impact of J. Ullrich's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by J. Ullrich with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites J. Ullrich more than expected).

Fields of papers citing papers by J. Ullrich

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by J. Ullrich. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by J. Ullrich. The network helps show where J. Ullrich may publish in the future.

Co-authorship network of co-authors of J. Ullrich

This figure shows the co-authorship network connecting the top 25 collaborators of J. Ullrich. A scholar is included among the top collaborators of J. Ullrich based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with J. Ullrich. J. Ullrich is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Liebisch, Tara Cubel, Jörn Stenger, & J. Ullrich. (2019). Understanding the Revised SI: Background, Consequences, and Perspectives. Annalen der Physik. 531(5). 12 indexed citations

Pflüger, Thomas, Oleg Zatsarinny, Klaus Bartschat, et al.. (2013). Electron-Impact Ionization of Neon at Low Projectile Energy: An Internormalized Experiment and Theory for a Complex Target. Physical Review Letters. 110(15). 153202–153202. 42 indexed citations

Grieser, M., et al.. (2011). Investigation of Intrabeam Scattering in the Heavy Ion Storage Ring TSR. Max Planck Digital Library. 2490–2492.

Pfeifer, Thomas, Yuhai Jiang, S. Düsterer, R. Moshammer, & J. Ullrich. (2010). Partial-coherence method to model experimental free-electron laser pulse statistics. Optics Letters. 35(20). 3441–3441. 66 indexed citations

Voitkiv, A. B., B. Najjari, & J. Ullrich. (2009). Inelastic Collisions of Relativistic Electrons with Atomic Targets in a Laser Field. Physical Review Letters. 103(19). 193201–193201. 5 indexed citations

Gopal, Ram, K. Simeonidis, R. Moshammer, et al.. (2009). Three-Dimensional Momentum Imaging of Electron Wave Packet Interference in Few-Cycle Laser Pulses. Physical Review Letters. 103(5). 53001–53001. 94 indexed citations

Pedersen, H. B., S. Altevogt, B. Jordon-Thaden, et al.. (2007). Crossed Beam Photodissociation Imaging ofHeH+with Vacuum Ultraviolet Free-Electron Laser Pulses. Physical Review Letters. 98(22). 223202–223202. 43 indexed citations

Kreß, M., Thomas Löffler, Mark D. Thomson, et al.. (2007). Measurement of the Carrier-Envelope Phase of Few-Cycle Laser Pulses by THz-Emission Spectroscopy. 2007 Conference on Lasers and Electro-Optics (CLEO). 2. 1–2. 1 indexed citations

Trinczek, M., Andreas A. Werdich, В. И. Миронов, et al.. (2006). A laser ion source for an electron beam ion trap. Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms. 251(1). 289–296. 17 indexed citations

10.

González, Antonio J., J. R. Crespo López-Urrutia, J. Braun, et al.. (2005). State-Selective Quantum Interference Observed in the Recombination of Highly ChargedHg75+⋯78+Mercury Ions in an Electron Beam Ion Trap. Physical Review Letters. 94(20). 203201–203201. 53 indexed citations

11.

Welsch, Carsten, M. Grieser, J. Ullrich, & A. Wolf. (2005). An ultra-low-energy storage ring at FLAIR. Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment. 546(3). 405–417. 33 indexed citations

12.

Fischer, D., Michael Schulz, R. Moshammer, et al.. (2005). Mutual ionization in200−keVH−+Hecollisions. Physical Review A. 72(6). 10 indexed citations

13.

Voitkiv, A. B., B. Najjari, & J. Ullrich. (2004). Mutual Projectile-Target Ionization via the Two-Center Dielectronic Interaction in Relativistic Ion-Atom Collisions. Physical Review Letters. 92(21). 213202–213202. 11 indexed citations

14.

Fiol, J.J., R. E. Olson, R. Moshammer, & J. Ullrich. (2003). Dynamical electron electron correlation in C² He simultaneous target projectile collisional ionization. Journal of Physics B Atomic Molecular and Optical Physics. 36(4). L99–L105. 1 indexed citations

15.

Tupitsyn, I. I., В. М. Шабаев, J. R. Crespo López-Urrutia, et al.. (2003). Relativistic calculations of isotope shifts in highly charged ions. Physical Review A. 68(2). 121 indexed citations

16.

Schulz, Michael, Robert Moshammer, N. Appathurai, & J. Ullrich. (2002). Triply differential single-ionization cross sections in fast ion-atom collisions at large perturbation. Journal of Physics B Atomic Molecular and Optical Physics. 35(7). L161–L166. 59 indexed citations

17.

Voitkiv, A. B., B. Najjari, R. Moshammer, & J. Ullrich. (2002). Helium single ionization in relativistic collisions with highly charged ions. Physical Review A. 65(3). 15 indexed citations

18.

Dörner, R., V. Mergel, L. Spielberger, et al.. (1997). Kinematically complete experiments using cold target recoil ion momentum spectroscopy. Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms. 124(2-3). 225–231. 40 indexed citations

19.

Stöhlker, Th., C. Kozhuharov, A. E. Livingston, et al.. (1991). Two-photon decay of the 1s2s1S0 state in36Kr34+ produced by resonant transfer and excitation. Zeitschrift für Physik D Atoms Molecules and Clusters. 21(S1). S233–S234. 2 indexed citations

20.

Olson, R. E., J. Ullrich, R. Dörner, & H. Schmidt‐Böcking. (1989). Single- and double-ionization cross sections for angular scattering of fast protons by helium. Physical review. A, General physics. 40(5). 2843–2846. 41 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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