Thomas R. O’Brian

861 total citations
34 papers, 617 citations indexed

About

Thomas R. O’Brian is a scholar working on Atomic and Molecular Physics, and Optics, Aerospace Engineering and Atmospheric Science. According to data from OpenAlex, Thomas R. O’Brian has authored 34 papers receiving a total of 617 indexed citations (citations by other indexed papers that have themselves been cited), including 15 papers in Atomic and Molecular Physics, and Optics, 13 papers in Aerospace Engineering and 10 papers in Atmospheric Science. Recurrent topics in Thomas R. O’Brian's work include Calibration and Measurement Techniques (13 papers), Atmospheric Ozone and Climate (10 papers) and Atomic and Molecular Physics (10 papers). Thomas R. O’Brian is often cited by papers focused on Calibration and Measurement Techniques (13 papers), Atmospheric Ozone and Climate (10 papers) and Atomic and Molecular Physics (10 papers). Thomas R. O’Brian collaborates with scholars based in United States, Egypt and South Korea. Thomas R. O’Brian's co-authors include J. E. Lawler, Ward Whaling, M. E. Wickliffe, J. W. Brault, T. B. Lucatorto, Emiel DenHartog, T. J. McIlrath, Craig J. Sansonetti, Scott Bergeson and S. L. Rolston and has published in prestigious journals such as Physical Review Letters, Applied Physics Letters and Physical Review A.

In The Last Decade

Thomas R. O’Brian

29 papers receiving 571 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Thomas R. O’Brian United States 10 237 213 111 96 87 34 617
R. J. Hutcheon United Kingdom 14 280 1.2× 138 0.6× 83 0.7× 182 1.9× 116 1.3× 27 552
M. J. Shallis United Kingdom 12 134 0.6× 585 2.7× 57 0.5× 83 0.9× 42 0.5× 25 747
W. H. Kegel Germany 11 139 0.6× 295 1.4× 100 0.9× 75 0.8× 70 0.8× 64 497
Kurt P. Jaehnig United States 12 168 0.7× 437 2.1× 48 0.4× 64 0.7× 76 0.9× 35 788
W. J. Tango Australia 18 398 1.7× 532 2.5× 62 0.6× 21 0.2× 97 1.1× 50 864
C. Stehlé France 16 379 1.6× 348 1.6× 124 1.1× 380 4.0× 146 1.7× 81 826
T. Iguchi Japan 14 215 0.9× 126 0.6× 123 1.1× 31 0.3× 124 1.4× 74 737
S. R. Golwala United States 19 181 0.8× 1.2k 5.6× 200 1.8× 26 0.3× 226 2.6× 85 1.4k
R. G. Fowler United States 13 209 0.9× 94 0.4× 101 0.9× 67 0.7× 174 2.0× 39 472
F. Delahaye France 14 157 0.7× 561 2.6× 34 0.3× 68 0.7× 58 0.7× 31 754

Countries citing papers authored by Thomas R. O’Brian

Since Specialization
Citations

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

Fields of papers citing papers by Thomas R. O’Brian

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Thomas R. O’Brian

This figure shows the co-authorship network connecting the top 25 collaborators of Thomas R. O’Brian. A scholar is included among the top collaborators of Thomas R. O’Brian 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 Thomas R. O’Brian. Thomas R. O’Brian 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.
O’Brian, Thomas R. & Scott A. Diddams. (2004). What is the fastest event (shortest time duration) that can be measured with today's technology and how is this done?. Scientific American.
2.
Buhr, Egbert, et al.. (2000). Intercomparison of Visual Diffuse Transmission Density Measurements. Journal of Imaging Science and Technology. 44(2). 156–159. 1 indexed citations
3.
Shaw, Ping-Shine, Keith R. Lykke, Rajeev Gupta, et al.. (1999). Ultraviolet radiometry with synchrotron radiation and cryogenic radiometry. Applied Optics. 38(1). 18–18. 32 indexed citations
4.
Early, Edward A., et al.. (1999). NIST Reference Densitometer for Visual Diffuse Transmission Density. Journal of Imaging Science and Technology. 43(4). 388–397. 3 indexed citations
5.
Bergeson, Scott, A. Balakrishnan, K. G. H. Baldwin, et al.. (1999). Measurement of the HE ground state lamb shift via the two-photon 1S–2S transition. Computer Standards & Interfaces. 21(2). 194–195. 6 indexed citations
6.
Bergeson, Scott, A. Balakrishnan, K. G. H. Baldwin, et al.. (1998). Measurement of the He Ground State Lamb Shift via the Two-Photon 11S-21S Transition: a new approach for testing QED at order α4 Ry and beyond. Physical Review Letters. 80. 1 indexed citations
7.
Thompson, Ambler, Edward A. Early, & Thomas R. O’Brian. (1998). Ultraviolet Spectral Irradiance Scale comparison: 210 nm to 300 nm. Journal of Research of the National Institute of Standards and Technology. 103(1). 1–1. 7 indexed citations
8.
Bergeson, Scott, A. Balakrishnan, K. G. H. Baldwin, et al.. (1998). Measurement of the He Ground State Lamb Shift via the Two-Photon1S1−2S1Transition. Physical Review Letters. 80(16). 3475–3478. 77 indexed citations
9.
O’Brian, Thomas R. & J. E. Lawler. (1997). Radiative lifetimes in CI and an atomic carbon beam source. Journal of Quantitative Spectroscopy and Radiative Transfer. 57(3). 309–315. 7 indexed citations
10.
Saito, T., et al.. (1996). Polarization Characteristics of Silicon Photodiodes and Its Dependence on Oxide Thickness in the Far UV Region. Review of Scientific Instruments. 67(9). 2 indexed citations
11.
O’Brian, Thomas R.. (1996). <title>SURF III: the next-generation radiometric storage ring facility at NIST</title>. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 2831. 222–228. 1 indexed citations
12.
Saito, T., et al.. (1996). Polarization characteristics of silicon photodiodes and their dependence on oxide thickness. Review of Scientific Instruments. 67(9). 3362–3362. 7 indexed citations
13.
Cromer, Christopher L., T. B. Lucatorto, Thomas R. O’Brian, & M. Walhout. (1995). Improved Dose Metrology in Optical Lithography. Solid State Technology. 39. 1 indexed citations
14.
Madden, R. P., Thomas R. O’Brian, A. C. Parr, R. D. Saunders, & V I Sapritsky. (1995). A method of realizing spectral-radiance and irradiance scales based on comparison of synchrotron and high-temperature black-body radiation. Metrologia. 32(6). 425–429. 8 indexed citations
15.
Xiong, Xianqing, et al.. (1992). RIS Measurement of AC Stark Shifts and Photoionization Cross Sections in Calcium. 128. 1 indexed citations
16.
Li, Qing, et al.. (1992). The ac Stark Shifts of High-Lying Rydberg Levels in Intense Electromagnetic Fields. Optics and Photonics News. 3(12). 23–23. 3 indexed citations
17.
O’Brian, Thomas R. & J. E. Lawler. (1992). Radiative lifetimes in B I using ultraviolet and vacuum-ultraviolet laser-induced fluorescence. NASA Technical Reports Server (NASA). 255. 420–426. 23 indexed citations
18.
O’Brian, Thomas R. & J. E. Lawler. (1991). Vacuum ultraviolet laser induced fluorescence on a Si atimic beam. Physics Letters A. 152(8). 407–411. 7 indexed citations
19.
Wamsley, R. C., et al.. (1991). Laser-induced fluorescence on Hg+ in Hg-Ar discharges. Applied Physics Letters. 59(23). 2947–2949. 3 indexed citations
20.
O’Brian, Thomas R., Ward Whaling, J. W. Brault, M. E. Wickliffe, & J. E. Lawler. (1991). Lifetimes, transition probabilities, and level energies in Fe i. Journal of the Optical Society of America B. 8(6). 1185–1185. 245 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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