Brian R. Judd

2.9k total citations · 2 hit papers
27 papers, 2.3k citations indexed

About

Brian R. Judd is a scholar working on Atomic and Molecular Physics, and Optics, Physical and Theoretical Chemistry and Materials Chemistry. According to data from OpenAlex, Brian R. Judd has authored 27 papers receiving a total of 2.3k indexed citations (citations by other indexed papers that have themselves been cited), including 16 papers in Atomic and Molecular Physics, and Optics, 8 papers in Physical and Theoretical Chemistry and 7 papers in Materials Chemistry. Recurrent topics in Brian R. Judd's work include Advanced Chemical Physics Studies (9 papers), Advanced Physical and Chemical Molecular Interactions (5 papers) and Quantum optics and atomic interactions (5 papers). Brian R. Judd is often cited by papers focused on Advanced Chemical Physics Studies (9 papers), Advanced Physical and Chemical Molecular Interactions (5 papers) and Quantum optics and atomic interactions (5 papers). Brian R. Judd collaborates with scholars based in United States, United Kingdom and France. Brian R. Judd's co-authors include J. A. White, S. Hüfner, H. Mendlowitz, J. C. Slater, W. A. Runciman, J.P. Elliott, M. Klapisch, Lloyd Armstrong, William G. Harter and A. Meftah and has published in prestigious journals such as Physics Today, Molecular Physics and Journal of Solid State Chemistry.

In The Last Decade

Brian R. Judd

26 papers receiving 2.1k citations

Hit Papers

Operator Techniques in Atomic Spectroscopy 1964 2026 1984 2005 1964 1979 100 200 300 400 500
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. Operator Techniques in Atomic Spectroscopy
    1964 554 citations Brian R. Judd, J. A. White Physics Today profile →
  2. Optical Spectra of Transparent Rare Earth Compounds
    1979 485 citations Brian R. Judd et al. Physics Today profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Brian R. Judd United States 19 1.2k 1.1k 366 316 308 27 2.3k
D. L. Huber United States 24 1.5k 1.3× 981 0.9× 521 1.4× 372 1.2× 76 0.2× 121 2.7k
Jack Sugar United States 38 3.3k 2.8× 692 0.6× 160 0.4× 94 0.3× 417 1.4× 104 4.2k
N. H. March United Kingdom 26 2.1k 1.8× 1.1k 1.0× 183 0.5× 81 0.3× 120 0.4× 207 3.4k
U. Öpik United Kingdom 12 1.4k 1.2× 593 0.6× 478 1.3× 30 0.1× 344 1.1× 21 2.0k
Chihiro Kikuchi United States 19 546 0.5× 560 0.5× 205 0.6× 79 0.3× 123 0.4× 43 1.5k
J. A. White United States 20 609 0.5× 474 0.4× 178 0.5× 72 0.2× 96 0.3× 46 1.6k
Jiřı́ Čı́žek Canada 23 3.0k 2.5× 634 0.6× 204 0.6× 61 0.2× 377 1.2× 51 3.8k
John C. Slater United States 18 2.7k 2.3× 1.2k 1.1× 456 1.2× 49 0.2× 430 1.4× 27 4.2k
K W H Stevens United Kingdom 30 2.1k 1.8× 2.1k 1.9× 2.2k 5.9× 327 1.0× 591 1.9× 126 5.1k
D J Newman United Kingdom 30 1.8k 1.5× 3.6k 3.3× 1.3k 3.5× 1.1k 3.5× 1.1k 3.6× 152 5.0k

Countries citing papers authored by Brian R. Judd

Since Specialization
Citations

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

Fields of papers citing papers by Brian R. Judd

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Brian R. Judd. 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 Brian R. Judd. The network helps show where Brian R. Judd may publish in the future.

Co-authorship network of co-authors of Brian R. Judd

This figure shows the co-authorship network connecting the top 25 collaborators of Brian R. Judd. A scholar is included among the top collaborators of Brian R. Judd 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 Brian R. Judd. Brian R. Judd 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.
Wyart, Jean-François, et al.. (2008). Theoretical study of ground-state configurations 4fNin Nd IV, Pr IV and Nd V. Journal of Physics B Atomic Molecular and Optical Physics. 41(8). 85001–85001. 19 indexed citations
2.
Judd, Brian R.. (2000). Reduced Density Matrices: Coulson’s Challenge. 169 indexed citations
3.
Judd, Brian R.. (1998). Operator Techniques in Atomic Spectroscopy. Princeton University Press eBooks. 69 indexed citations
4.
Judd, Brian R. & W. A. Runciman. (1976). Transverse Zeeman effect for ions in uniaxial crystals. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 352(1668). 91–108. 18 indexed citations
5.
Armstrong, Lloyd & Brian R. Judd. (1970). Atomic structure calculations in a factorized shell. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 315(1520). 39–48. 8 indexed citations
6.
Armstrong, Lloyd & Brian R. Judd. (1970). Quasi-particles in atomic shell theory. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 315(1520). 27–37. 18 indexed citations
7.
Judd, Brian R. & J.P. Elliott. (1970). Topics in atomic & nuclear theory.
8.
Judd, Brian R. & Lindsay‐Marie Armstrong. (1969). Matrix factorizations for the Coulomb interaction between electrons in atoms. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 309(1497). 185–194. 4 indexed citations
9.
Judd, Brian R., et al.. (1965). Hyperfine structure of Eu I. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 289(1416). 81–96. 43 indexed citations
10.
Judd, Brian R. & J. A. White. (1964). Operator Techniques in Atomic Spectroscopy. Physics Today. 17(4). 72–74. 554 indexed citations breakdown →
11.
Judd, Brian R.. (1959). An analysis of the fluorescence spectrum of neodymium chloride. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 251(1264). 134–142. 38 indexed citations
12.
Judd, Brian R.. (1959). Spin-orbit interaction in the configuration f3. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 251(1264). 127–133. 25 indexed citations
13.
Judd, Brian R.. (1959). The matrix elements of tensor operators for configurations of three equivalent electrons. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 250(1263). 562–574. 30 indexed citations
14.
Judd, Brian R.. (1959). Exchange interactions in antiferromagnetic salts of iridium III. Theory of the interaction. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 250(1260). 110–120. 23 indexed citations
15.
Elliott, J.P., Brian R. Judd, & W. A. Runciman. (1957). Energy levels in rare-earth ions. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 240(1223). 509–523. 139 indexed citations
16.
Judd, Brian R.. (1957). A crystal field of icosahedral symmetry. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 241(1224). 122–131. 56 indexed citations
17.
Judd, Brian R.. (1957). An analysis of the absorption spectrum of praseodymium chloride. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 241(1226). 414–422. 68 indexed citations
18.
Judd, Brian R.. (1955). The magnetic and spectroscopic properties of certain rare-earth double nitrates. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 232(1191). 458–474. 64 indexed citations
19.
Judd, Brian R.. (1955). Operator equivalents and matrix elements for the excited states of rare-earth ions. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 227(1171). 552–560. 53 indexed citations
20.
Judd, Brian R.. (1955). The theory of the spectra of europium salts. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 228(1172). 120–128. 34 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by D. L. Huber Breakdown of academic impact, for papers by Jack Sugar Breakdown of academic impact, for papers by N. H. March Breakdown of academic impact, for papers by U. Öpik Breakdown of academic impact, for papers by Chihiro Kikuchi Breakdown of academic impact, for papers by J. A. White Breakdown of academic impact, for papers by Jiřı́ Čı́žek Breakdown of academic impact, for papers by John C. Slater Breakdown of academic impact, for papers by K W H Stevens Breakdown of academic impact, for papers by D J Newman
Rankless by CCL
2026