World's Best Scientists 2026 revealed!

D-Index & Metrics

Chemistry

D-Index
60
Citations
11349
World Ranking
9822
National Ranking
2748

A. R. W. McKellar publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where A. R. W. McKellar sits on this spectrum.

61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61 publications 1,295+

This scientist: 385 publications — 78th percentile

78% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

A. R. W. McKellar D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where A. R. W. McKellar sits on this spectrum.

40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40 D-Index 159+

This scientist: 60 D-Index — 47th percentile

47% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

Research.com Recognitions

  • 1990 - Fellow of the Royal Society of Canada Academy of Science
  • 1942 - Fellow of the Royal Society of Canada

Overview

A. R. W. McKellar is affiliated with the National Academies of Sciences, Engineering, and Medicine in the United States. Their research primarily focuses on the fields of chemistry and physics and astronomy, with significant contributions in spectroscopy, atomic and molecular physics, and optics. The scientist has published extensively in areas including atmospheric science and inorganic chemistry.

Their main research topics include spectroscopy and laser applications, advanced chemical physics studies, molecular spectroscopy and structure, atmospheric ozone and climate, quantum and superfluid helium dynamics, atmospheric and environmental gas dynamics, and inorganic fluorides and related compounds.

Frequent coauthors with whom McKellar has collaborated include:

  • N. Moazzen-Ahmadi
  • A. J. Barclay
  • Andrea Pietropolli Charmet
  • N. Moazzen-Ahmadi

They have published research in several venues, notably:

  • The Journal of Chemical Physics
  • arXiv (Cornell University)
  • Journal of Molecular Spectroscopy
  • Proceedings of the 2021 International Symposium on Molecular Spectroscopy
  • Physical Chemistry Chemical Physics

Recent papers authored or coauthored by McKellar include:

  • Spectra of CO2-N2 dimer in the 4.2 μm region: Symmetry breaking of the intramolecular CO2 bend, the intermolecular bend, and higher K-values for the fundamental (2020), The Journal of Chemical Physics
  • New infrared spectra of CO2 - Ne: Fundamental for CO2 -22Ne isotopologue, intermolecular bend, and symmetry breaking of the intramolecular CO2 bend (2021), Chemical Physics Letters
  • Doped rare gas clusters up to completion of first solvation shell, CO2-(Rg)n, n = 3-17, Rg = Ar, Kr, Xe (2023), The Journal of Chemical Physics
  • Infrared spectra of both isomers of CO2-CO in the CO2 v3 region (2021), Molecular Physics
  • Weakly-bound clusters of atmospheric molecules: infrared spectra and structural calculations of (CO2)n-(CO)m-(N2)p, (n,m,p) = (2,1,0), (2,0,1), (1,2,0), (1,0,2), (1,1,1), (1,3,0), (1,0,3), (1,2,1), (1,1,2) (2022), Physical Chemistry Chemical Physics

A. R. W. McKellar has been recognized as a Fellow of the Royal Society of Canada, receiving this honor in 1942 and again in 1990 with citation to the Academy of Science.

Best Publications

  • Far infrared laser magnetic resonance of singlet methylene: Singlet–triplet perturbations, singlet–triplet transitions, and the singlet–triplet splittinga)

    A. R. W. McKellar;P. R. Bunker;Trevor J. Sears;K. M. Evenson

  • Quantum Solvation of Carbonyl Sulfide with Helium Atoms

    Jian Tang;Yunjie Xu;A. R. W. McKellar;Wolfgang Jäger

  • THE ROTATIONAL SPECTRUM AND HYPERFINE STRUCTURE OF THE METHYLENE RADICAL CH2 STUDIED BY FAR INFRARED LASER MAGNETIC RESONANCE SPECTROSCOPY

    T. J. Sears;P. R. Bunker;A. R. W. Mckellar;K. M. Evenson

  • Infrared spectrum and potential energy surface of He–CO

    Claudio E. Chuaqui;Robert J. Le Roy;A. R. W. McKellar

  • The infrared spectrum of the ν2 fundamental band of the molecular ion

    J. K. G. Watson;S. C. Foster;A. R. W. McKellar

  • Spectroscopic studies of quantum solvation in 4HeN-N2O clusters.

    Yunjie Xu;Wolfgang Jäger;Jian Tang;A. R. W. McKellar

  • Anisotropic Intermolecular Force Effects in Spectra of H2– and D2–Rare‐Gas Complexes

    A. R. W. McKellar;H. L. Welsh

  • THE NO DIMER : 15N ISOTOPIC INFRARED SPECTRA, LINE-WIDTHS, AND FORCE FIELD

    A. R. W. McKellar;J. K. G. Watson;B. J. Howard

  • Laser magnetic resonance spectroscopy of the ν3 fundamental band of HO2 at 9.1 μm

    J. W. C. Johns;A. R. W. McKellar;M. Riggin

  • The ν3 fundamental bands of HN+2, DN+2, and DCO+

    S. C. Foster;A. R. W. McKellar

  • Bridging the Gap between Small Clusters and Nanodroplets: Spectroscopic Study and Computer Simulation of Carbon Dioxide Solvated with Helium Atoms

    J. Tang;A. R. W. Mckellar;F. Mezzacapo;S. Moroni

  • Spectra of (H2)2, (D2)2, and H2–D2 Van der Waals Complexes

    A. R. W. McKellar;H. L. Welsh

  • Observation of the ν3 fundamental band of HCO

    S. C. Foster;A. R. W. McKellar;Trevor J. Sears

  • Collision‐induced Lamb dips in laser Stark spectroscopy

    J. W. C. Johns;A. R. W. McKellar;T. Oka;M. Römheld

  • Spectroscopic exploration of atomic scale superfluidity in doped helium nanoclusters.

    A. R. W. McKellar;Yunjie Xu;Wolfgang Jäger

  • Improved laser frequencies and Dunham coefficients for isotopically substituted carbon monoxide

    R. M. Dale;M. Herman;J. W. C. Johns;A. R. W. McKellar

  • Diode laser spectroscopy of gas phase C5: The ν3 fundamental and associated hot bands

    N. Moazzen‐Ahmadi;A. R. W. McKellar;T. Amano

  • Spectroscopy of dimers, trimers and larger clusters of linear molecules

    N. Moazzen-Ahmadi;A.R.W. McKellar

  • High-Resolution Infrared Spectroscopy with Synchrotron Sources

    A.R.W. McKellar

  • Infrared absorption spectroscopy of the COAr complex

    A.R.W McKellar;Y.P Zeng;S.W Sharpe;C Wittig

  • Laser Spectroscopy V

    A. R. W. McKellar;T. Oka;B. P. Stoicheff

  • Cluster dynamics in the range N=2–20: High resolution infrared spectra of HeN–CO

    Jian Tang;A. R. W. McKellar

Frequent Co-Authors

Trevor J. Sears
Trevor J. Sears Stony Brook University
Robert J. Le Roy
Robert J. Le Roy University of Waterloo
Takeshi Oka
Takeshi Oka University of Chicago
Wolfgang Jäger
Wolfgang Jäger University of Alberta
Daniel Hurtmans
Daniel Hurtmans Université Libre de Bruxelles
Tucker Carrington
Tucker Carrington Queen's University
Krzysztof Szalewicz
Krzysztof Szalewicz University of Delaware
James B. Burkholder
James B. Burkholder National Oceanic and Atmospheric Administration
Michel Herman
Michel Herman Université Libre de Bruxelles
John M. Brown
John M. Brown University of Oxford

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