Robert S. Freund

4.3k total citations · 1 hit paper
101 papers, 3.5k citations indexed

About

Robert S. Freund is a scholar working on Atomic and Molecular Physics, and Optics, Spectroscopy and Electrical and Electronic Engineering. According to data from OpenAlex, Robert S. Freund has authored 101 papers receiving a total of 3.5k indexed citations (citations by other indexed papers that have themselves been cited), including 79 papers in Atomic and Molecular Physics, and Optics, 44 papers in Spectroscopy and 28 papers in Electrical and Electronic Engineering. Recurrent topics in Robert S. Freund's work include Atomic and Molecular Physics (52 papers), Advanced Chemical Physics Studies (48 papers) and Mass Spectrometry Techniques and Applications (26 papers). Robert S. Freund is often cited by papers focused on Atomic and Molecular Physics (52 papers), Advanced Chemical Physics Studies (48 papers) and Mass Spectrometry Techniques and Applications (26 papers). Robert S. Freund collaborates with scholars based in United States, Germany and France. Robert S. Freund's co-authors include Robert C. Wetzel, James A. Schiavone, Todd R. Hayes, Terry A. Miller, R. J. Shul, F. A. Baiocchi, Kermit C. Smyth, William Klemperèr, Bernard R. Zegarski and H. M. Crosswhite and has published in prestigious journals such as Journal of the American Chemical Society, Physical Review Letters and The Journal of Chemical Physics.

In The Last Decade

Robert S. Freund

98 papers receiving 3.1k citations

Hit Papers

Absolute cross sections for electron-impact ionization of... 1987 2026 2000 2013 1987 100 200 300
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.

  1. Absolute cross sections for electron-impact ionization of the rare-gas atoms by the fast-neutral-beam method
    1987 344 citations Robert C. Wetzel, Robert S. Freund et al. profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Robert S. Freund United States 33 2.6k 1.5k 1.0k 566 390 101 3.5k
J W McConkey Canada 29 2.3k 0.9× 884 0.6× 529 0.5× 654 1.2× 195 0.5× 167 3.0k
C. B. Collins United States 34 2.0k 0.8× 897 0.6× 1.5k 1.4× 785 1.4× 949 2.4× 218 4.1k
A. Chutjian United States 33 3.4k 1.3× 1.3k 0.9× 953 0.9× 671 1.2× 415 1.1× 129 4.4k
B. G. Lindsay United States 25 1.5k 0.6× 895 0.6× 470 0.5× 299 0.5× 200 0.5× 63 2.5k
L. W. Anderson United States 36 2.5k 1.0× 894 0.6× 898 0.9× 694 1.2× 530 1.4× 150 3.6k
R. R. Freeman United States 41 3.4k 1.3× 845 0.6× 811 0.8× 842 1.5× 760 1.9× 182 5.5k
R.K. Janev North Macedonia 25 1.9k 0.7× 615 0.4× 537 0.5× 461 0.8× 421 1.1× 127 2.6k
H. Deutsch Germany 37 2.5k 1.0× 1.2k 0.8× 1.4k 1.3× 751 1.3× 1.3k 3.4× 158 4.7k
Loucas G. Christophorou United States 27 1.5k 0.6× 698 0.5× 1.2k 1.2× 309 0.5× 541 1.4× 102 2.6k
Alan Gallagher United States 41 3.4k 1.3× 1.1k 0.8× 2.2k 2.2× 620 1.1× 1.9k 4.9× 141 5.7k

Countries citing papers authored by Robert S. Freund

Since Specialization
Citations

This map shows the geographic impact of Robert S. Freund'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 Robert S. Freund with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Robert S. Freund more than expected).

Fields of papers citing papers by Robert S. Freund

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Robert S. Freund. 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 Robert S. Freund. The network helps show where Robert S. Freund may publish in the future.

Co-authorship network of co-authors of Robert S. Freund

This figure shows the co-authorship network connecting the top 25 collaborators of Robert S. Freund. A scholar is included among the top collaborators of Robert S. Freund 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 Robert S. Freund. Robert S. Freund is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Freund, Robert S., et al.. (2025). Dynamical quantum maps for single-qubit gates under universal non-Markovian noise. Physical Review Research. 7(1).
2.
Freund, Robert S., et al.. (2024). Solving an industrially relevant quantum chemistry problem on quantum hardware. Quantum Science and Technology. 10(1). 15066–15066. 5 indexed citations
3.
Mannáerts, J. P., et al.. (1994). Interface analysis of dry etched and molecular beam epitaxial regrown AlGaAs. Journal of Vacuum Science & Technology B Microelectronics and Nanometer Structures Processing Measurement and Phenomena. 12(2). 1038–1042.
4.
5.
Choquette, Kent D., Robert C. Wetzel, Robert S. Freund, & R. F. Kopf. (1992). Electron cyclotron resonance plasma etching using downstream magnetic confinement. Journal of Vacuum Science & Technology B Microelectronics and Nanometer Structures Processing Measurement and Phenomena. 10(6). 2725–2728. 10 indexed citations
6.
Dalgarno, A., et al.. (1990). The physics of electronic and atomic collisions. AIPC. 205. 48 indexed citations
7.
Dalgarno, A., et al.. (1989). Sixteenth International Conference on the Physics of Electronic and Atomic Collisions. University of North Texas Digital Library (University of North Texas). 2 indexed citations
8.
Freund, Robert S.. (1983). High-Rydberg molecules. 355. 6 indexed citations
9.
Jost, R., M. Lombardi, Robert S. Freund, & Terry A. Miller. (1979). The 3d-triplet complex of molecular hydrogen : the measured Zeeman effect and the calculated eigenvectors and g-factors. Molecular Physics. 37(5). 1605–1620. 27 indexed citations
10.
Freund, Robert S., Terry A. Miller, R. Jost, & M. Lombardi. (1978). Singlet–triplet anticrossings between the doubly excited 3 1K state and the g (3d)  3Σ+g state of H2. The Journal of Chemical Physics. 68(4). 1683–1688. 19 indexed citations
11.
Freund, Robert S., et al.. (1977). Collisional angular momentum transfer in rydberg states of helium. Chemical Physics Letters. 51(1). 18–22. 9 indexed citations
12.
Böck, H., et al.. (1976). Photoelectron spectra and molecular properties. LI. Ionization potentials of silanes SinH2n+2. Journal of the American Chemical Society. 98(3). 668–674. 128 indexed citations
13.
Schiavone, James A., Kermit C. Smyth, & Robert S. Freund. (1975). Dissociative excitation of H2 by electron impact: Translational spectroscopy of long lived high Rydberg fragment atoms. The Journal of Chemical Physics. 63(3). 1043–1051. 74 indexed citations
14.
Miller, Terry A. & Robert S. Freund. (1974). Singlet-triplet anticrossings in H2. The Journal of Chemical Physics. 61(5). 2160–2162. 53 indexed citations
15.
Freund, Robert S. & Terry A. Miller. (1973). Fine structure of para-H2 d(3p) 3Πu (ν = 0–3) via microwave optical magnetic resonance induced by electrons. The Journal of Chemical Physics. 58(9). 3565–3573. 30 indexed citations
16.
Smyth, Kermit C., James A. Schiavone, & Robert S. Freund. (1973). Dissociative excitation of N2 by electron impact: Translational spectroscopy of long-lived high-Rydberg fragment atoms. The Journal of Chemical Physics. 59(10). 5225–5241. 91 indexed citations
17.
Freund, Robert S.. (1971). Electron Impact Excitation Functions for the a 1Πg and D 3Σu+ States of N2. The Journal of Chemical Physics. 54(3). 1407–1409. 14 indexed citations
18.
Freund, Robert S., et al.. (1970). Radio-Frequency Spectrum of Metastable N2(A 3Σu+). I. Magnetic Hyperfine and Electric Quadrupole Constants. The Journal of Chemical Physics. 53(6). 2290–2303. 24 indexed citations
19.
Freund, Robert S., et al.. (1969). Simple Source for a High Velocity Molecular Beam. Review of Scientific Instruments. 40(11). 1515–1515.
20.
Freund, Robert S. & William Klemperèr. (1967). Molecular Beam Time-of-Flight Measurements for the Study of Metastable and Repulsive Electronic States. The Journal of Chemical Physics. 47(8). 2897–2904. 63 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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