Takeshi Oka

14.1k total citations · 1 hit paper
265 papers, 11.3k citations indexed

About

Takeshi Oka is a scholar working on Spectroscopy, Atomic and Molecular Physics, and Optics and Atmospheric Science. According to data from OpenAlex, Takeshi Oka has authored 265 papers receiving a total of 11.3k indexed citations (citations by other indexed papers that have themselves been cited), including 195 papers in Spectroscopy, 161 papers in Atomic and Molecular Physics, and Optics and 98 papers in Atmospheric Science. Recurrent topics in Takeshi Oka's work include Spectroscopy and Laser Applications (144 papers), Molecular Spectroscopy and Structure (121 papers) and Atmospheric Ozone and Climate (98 papers). Takeshi Oka is often cited by papers focused on Spectroscopy and Laser Applications (144 papers), Molecular Spectroscopy and Structure (121 papers) and Atmospheric Ozone and Climate (98 papers). Takeshi Oka collaborates with scholars based in United States, Canada and Japan. Takeshi Oka's co-authors include Yonezo Morino, Benjamin J. McCall, T. R. Geballe, Mark W. Crofton, M. F. Jagod, S. M. Freund, B. D. Rehfuss, Di‐Jia Liu, Kojiro Takagi and T. R. Geballe and has published in prestigious journals such as Nature, Science and Chemical Reviews.

In The Last Decade

Takeshi Oka

262 papers receiving 10.9k citations

Hit Papers

Observation of the Infrared Spectrum ofH3+ 1980 2026 1995 2010 1980 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. Observation of the Infrared Spectrum ofH3+
    1980 395 citations Takeshi Oka profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Takeshi Oka United States 60 7.8k 7.7k 3.6k 2.5k 683 265 11.3k
G. Winnewisser Germany 40 4.4k 0.6× 6.3k 0.8× 3.3k 0.9× 3.2k 1.3× 504 0.7× 290 8.3k
J. K. G. Watson Canada 48 7.5k 1.0× 7.3k 0.9× 3.3k 0.9× 722 0.3× 481 0.7× 168 9.8k
Nigel G. Adams United Kingdom 49 4.9k 0.6× 4.3k 0.6× 2.2k 0.6× 1.4k 0.6× 731 1.1× 209 7.5k
P. Thaddeus United States 66 7.3k 0.9× 7.0k 0.9× 3.6k 1.0× 6.8k 2.7× 427 0.6× 324 13.6k
E. E. Ferguson United States 57 4.1k 0.5× 4.3k 0.6× 4.0k 1.1× 2.2k 0.9× 1.1k 1.5× 201 9.5k
David W. Schwenke United States 62 7.6k 1.0× 4.9k 0.6× 3.4k 0.9× 725 0.3× 469 0.7× 217 11.0k
F. J. Lovas United States 49 5.0k 0.6× 5.0k 0.7× 2.1k 0.6× 1.6k 0.6× 300 0.4× 154 7.5k
Martin Qüack Switzerland 60 10.2k 1.3× 9.2k 1.2× 3.3k 0.9× 720 0.3× 708 1.0× 351 13.6k
Millard H. Alexander United States 53 9.2k 1.2× 5.8k 0.8× 3.2k 0.9× 755 0.3× 443 0.6× 294 10.5k
Kentarou Kawaguchi Japan 41 4.0k 0.5× 3.5k 0.5× 2.0k 0.6× 1.3k 0.5× 378 0.6× 187 5.8k

Countries citing papers authored by Takeshi Oka

Since Specialization
Citations

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

Fields of papers citing papers by Takeshi Oka

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Takeshi Oka. 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 Takeshi Oka. The network helps show where Takeshi Oka may publish in the future.

Co-authorship network of co-authors of Takeshi Oka

This figure shows the co-authorship network connecting the top 25 collaborators of Takeshi Oka. A scholar is included among the top collaborators of Takeshi Oka 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 Takeshi Oka. Takeshi Oka 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.
York, Donald G., J. A. Thorburn, Theodore P. Snow, et al.. (2010). A NEW ATLAS OF THE DIFFUSE INTERSTELLAR BANDS: HD 183143. The Knowledge Bank (The Ohio State University). 65. 1 indexed citations
2.
Indriolo, Nick, T. R. Geballe, Takeshi Oka, & Benjamin J. McCall. (2009). VARIABILITY OF THE COSMIC-RAY IONIZATION RATE IN DIFFUSE MOLECULAR CLOUDS. 64.
3.
Geballe, T. R., Miwa Goto, Tomonori Usuda, Takeshi Oka, & Benjamin J. McCall. (2006). The Interstellar Medium of IRAS 08572+3915 NW: H3+ and Warm High Velocity CO. ArXiv.org. 22 indexed citations
4.
Goto, Miwa, T. R. Geballe, Benjamin J. McCall, et al.. (2005). Search for H3+ in HD141569A. arXiv (Cornell University). 7 indexed citations
5.
Hobbs, L. M., J. A. Thorburn, Takeshi Oka, et al.. (2004). Atomic and Molecular Emission Lines from the Red Rectangle. The Astrophysical Journal. 615(2). 947–957. 33 indexed citations
6.
Gottfried, Jennifer L., Benjamin J. McCall, & Takeshi Oka. (2003). Near-infrared spectroscopy of H3+ above the barrier to linearity. The Journal of Chemical Physics. 118(24). 10890–10899. 34 indexed citations
7.
Oka, Takeshi. (2000). Astronomy, Physics, and Chemistry of H 3 +. 24. 17. 4 indexed citations
8.
9.
Geballe, T. R. & Takeshi Oka. (1996). Detection of H+3 in interstellar space. Nature. 384(6607). 334–335. 283 indexed citations
10.
Miller, S., N. Achilleos, Jonathan Tennyson, et al.. (1994). The Effect of the SL9 Impact on Jupiter's Aurorae. 26. 1596. 1 indexed citations
11.
Bawendi, Moungi G., B. D. Rehfuss, & Takeshi Oka. (1990). Laboratory observation of hot bands of H+3. The Journal of Chemical Physics. 93(9). 6200–6209. 82 indexed citations
12.
Oka, Takeshi. (1988). Infrared spectroscopy of carbo-ions. Philosophical Transactions of the Royal Society of London Series A Mathematical and Physical Sciences. 324(1578). 81–95. 39 indexed citations
13.
Takeichi, Sanae, et al.. (1986). Experimental Studies on Death by Fire in Automobiles and Exhaust Gas Poisoning. American Journal of Forensic Medicine & Pathology. 7(4). 301–304. 4 indexed citations
14.
Magerl, Gottfried, et al.. (1984). Sub-doppler spectroscopy of the ν2 band of NH3 using microwave modulation sidebands of CO2 laser lines. Journal of Molecular Spectroscopy. 107(1). 72–83. 62 indexed citations
15.
Oka, Takeshi, et al.. (1983). Microwave studies of collision-induced transitions between rotational levels. VIII. Collisions between NH3 and polar molecules. The Journal of Chemical Physics. 78(6). 3462–3466. 5 indexed citations
16.
Oka, Takeshi. (1982). Intracavity infrared-microwave double-resonance spectroscopy. Philosophical Transactions of the Royal Society of London Series A Mathematical and Physical Sciences. 307(1500). 591–601. 6 indexed citations
17.
Oka, Takeshi. (1981). A search for interstellar H+3. Philosophical Transactions of the Royal Society of London Series A Mathematical and Physical Sciences. 303(1480). 543–549. 63 indexed citations
18.
Oka, Takeshi. (1980). Observation of the infrared spectrum of H 3 + (A). Journal of the Optical Society of America A. 70. 1577. 2 indexed citations
19.
Freund, S. M., J. W. C. Johns, A. R. W. McKellar, & Takeshi Oka. (1973). Infrared-infrared double resonance experiments using a two-photon technique. The Journal of Chemical Physics. 59(7). 3445–3453. 41 indexed citations
20.
Kuchitsu, K., Takeshi Oka, & Yonezo Morino. (1965). Calculation of inertia defect. Journal of Molecular Spectroscopy. 15(1). 51–67. 47 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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