World's Best Scientists 2026 revealed!

D-Index & Metrics

Chemistry

D-Index
54
Citations
8542
World Ranking
12806
National Ranking
348

Ajit J. Thakkar 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 Ajit J. Thakkar 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: 265 publications — 54th percentile

54% of scientists in this discipline score the same or lower.

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

Ajit J. Thakkar 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 Ajit J. Thakkar 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: 54 D-Index — 31st percentile

31% 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

  • 1984 - Fellow of Alfred P. Sloan Foundation

Overview

Ajit J. Thakkar is affiliated with the University of New Brunswick in Canada. Their research contributions span multiple fields, primarily focusing on Earth and Planetary Sciences as well as Chemistry. Within these domains, their work is particularly centered on Atmospheric Science and Physical and Theoretical Chemistry.

The main topics covered by their research include:

  • Atmospheric Ozone and Climate
  • Photochemistry and Electron Transfer Studies
  • Atmospheric Chemistry and Aerosols
  • History and Advancements in Chemistry

Recent publications by Ajit J. Thakkar demonstrate engagement with both chemical physics and computational chemistry. Selected papers include:

  • "Dipole oscillator strength distributions, sum rules, mean excitation energies, and isotropic van der Waals coefficients for benzene, pyridazine, pyrimidine, pyrazine, s-triazine, toluene, hexafluorobenzene, and nitrobenzene," 2020, The Journal of Chemical Physics
  • "Out with the old, in with the new," 2020, Computational and Theoretical Chemistry
  • "Fritz Grein and his scientific career exceeding 65 years," 2023, Computational and Theoretical Chemistry

Their peer-reviewed work has appeared predominantly in the following venues:

  • Computational and Theoretical Chemistry
  • The Journal of Chemical Physics

Throughout their career, Ajit J. Thakkar has not been documented as collaborating frequently with specific co-authors.

In recognition of their contributions, Ajit J. Thakkar was named a Fellow of the Alfred P. Sloan Foundation in 1984.

Best Publications

  • Intermolecular forces via hybrid Hartree–Fock–SCF plus damped dispersion (HFD) energy calculations. An improved spherical model

    C. Douketis;G. Scoles;S. Marchetti;M. Zen

  • Compact and accurate integral-transform wave functions. I. The 1 S 1 state of the helium-like ions from H − through Mg 1 0 +

    Ajit J. Thakkar;Vedene H. Smith

  • Multipole moments, polarizabilities, and hyperpolarizabilities for N2 from fourth‐order many‐body perturbation theory calculations

    George Maroulis;Ajit J. Thakkar

  • Ab initio dispersion coefficients for interactions involving rare-gas atoms

    Ajit J. Thakkar;Hinne Hettema;Paul E. S. Wormer

  • Improved Roothaan–Hartree–Fock wave functions for atoms and ions with N≤54

    Toshikatsu Koga;Shinya Watanabe;Katsutoshi Kanayama;Ryuji Yasuda

  • The generator coordinate method applied to variational perturbation theory. Multipole polarizabilities, spectral sums, and dispersion coefficients for helium

    Ajit J. Thakkar

  • Analytical Hartree–Fock wave functions for the atoms Cs to Lr

    Toshikatsu Koga;Katsutoshi Kanayama;Tadanori Watanabe;Takashi Imai

  • Analytical Hartree–Fock wave functions subject to cusp and asymptotic constraints: He to Xe, Li+ to Cs+, H− to I−

    Toshikatsu Koga;Katsutoshi Kanayama;Shinya Watanabe;Ajit J. Thakkar

  • The electron—electron cusp condition for the spherical average of the intracule matrix

    Ajit J. Thakkar;Vedene H. Smith

  • A new generalized expansion for the potential energy curves of diatomic molecules

    Ajit J. Thakkar

  • Comparison of kinetic-energy density functionals

    Ajit J. Thakkar

  • Higher dispersion coefficients: Accurate values for hydrogen atoms and simple estimates for other systems

    Ajit J. Thakkar

  • Double and quadruple zeta contracted Gaussian basis sets for hydrogen through neon

    Ajit J. Thakkar;Toshikatsu Koga;Maki Saito;Ruth E. Hoffmeyer

  • Oscillator strengths for S-P and P-D transitions in heliumlike ions.

    Natalie Mary Cann;Ajit J. Thakkar

  • Two new anisotropic potential energy surfaces for nitrogen-helium: the use of Hartree-Fock SCF calculations and a combining rule for anisotropic long-range dispersion coefficients

    R. R. Fuchs;F. R. W. McCourt;A. J. Thakkar;F. Grein

  • Polarizabilities and hyperpolarizabilities of carbon dioxide

    George Maroulis;Ajit J. Thakkar

  • Accurate charge densities and two‐electron intracule functions for the heliumlike ions

    Ajit J. Thakkar;Vedene H. Smith

  • Statistical electron correlation coefficients for the five lowest states of the heliumlike ions

    Ajit J. Thakkar;Vedene H. Smith

  • Compact and accurate integral-transform wave functions. II. The 2 /sup 1/S, 2 /sup 3/S, 2 /sup 1/P, and 2 /sup 3/P states of the helium-like ions from He through Mg/sup 10 +/

    Ajit J. Thakkar;Vedene H. Smith

  • Hyperpolarizabilities and polarizabilities of neon: Discrepancy between theory and experiment

    George Maroulis;Ajit J. Thakkar

Frequent Co-Authors

Vedene H. Smith
Vedene H. Smith Queen's University
George Maroulis
George Maroulis University of Patras
Jesús S. Dehesa
Jesús S. Dehesa University of Granada
William J. Meath
William J. Meath University of Western Ontario
Paul E. S. Wormer
Paul E. S. Wormer Radboud University
Russell J. Boyd
Russell J. Boyd Dalhousie University
Manuel Yáñez
Manuel Yáñez Autonomous University of Madrid
Christopher J. Cramer
Christopher J. Cramer UL Research Institutes
Pratim K. Chattaraj
Pratim K. Chattaraj Birla Institute of Technology, Mesra
Samuel Krimm
Samuel Krimm University of Michigan–Ann Arbor

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