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Top 100 Scientists

World Top 100 Scientists 2026

The Top 100 scientists are ranked based on total H-index scores at the global, regional, national, and institutional levels. Rankings cover 10 regions, 13 main fields, and 221 subfields. Subject field rankings (at world, region, country, and university levels) are currently in Beta version and updated in near real-time.
Note: Researchers classified as "others" (currently 1,123,368 profiles whose fields are undetermined or unedited) are excluded from subject and regional rankings. These rankings will dynamically evolve as the “others” profiles are reviewed and properly categorized.

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Total 797 scientist
* Total H Index Rankings

Rankings

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819
World Rank
Romania
2
Country Rank
Horia Hulubei National Institute of Physics and Nuclear Engineering Logo
2
University
Ranking Based On Selection:
1
Irinel Caprini
Horia Hulubei National Institute of Physics and Nuclear Engineering Măgurele, Romania
Engineering & Technology / Nuclear Engineering
Particle Physics | Field Theor

H-Index Metrics

  • H-Index
    191
  • i10 Index
    448
  • Citation Counts
    172,072
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* Total H Index Rankings

Rankings

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1,853
World Rank
United States
782
Country Rank
Massachusetts Institute of Technology Logo
19
University
Ranking Based On Selection:
2
Ju Li
Massachusetts Institute of Technology Cambridge, United States
Engineering & Technology / Nuclear Engineering
Computational Materials Science | metallurgy | solid mechanics | nanocomposites | batterie

H-Index Metrics

  • H-Index
    154
  • i10 Index
    574
  • Citation Counts
    91,564
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* Total H Index Rankings

Rankings

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4,999
World Rank
Netherlands
120
Country Rank
Utrecht University Logo
16
University
Ranking Based On Selection:
3
Martinus Th Van Genuchten
Utrecht University Utrecht, Netherlands
Engineering & Technology / Nuclear Engineering
hydrology | vadose zone | environmental science | contaminant transpor

H-Index Metrics

  • H-Index
    120
  • i10 Index
    365
  • Citation Counts
    105,642
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* Total H Index Rankings

Rankings

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20,624
World Rank
United States
8,863
Country Rank
Purdue University Logo
46
University
Ranking Based On Selection:
4
Mamoru Ishii
Purdue University West Lafayette, United States
Engineering & Technology / Nuclear Engineering
Two-phase flow | Nuclear Engineering | Thermal Hydraulics | Safety Analysis | Two-fluid Model Developmen

H-Index Metrics

  • H-Index
    82
  • i10 Index
    335
  • Citation Counts
    37,650
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* Total H Index Rankings

Rankings

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25,469
World Rank
United States
10,771
Country Rank
University of Michigan Logo
232
University
Ranking Based On Selection:
5
Lumin Wang
University of Michigan Ann Arbor, United States
Engineering & Technology / Nuclear Engineering
Radiation Effects | Nuclear Materials | Ion Beam Modification | TEM Characterizatio

H-Index Metrics

  • H-Index
    77
  • i10 Index
    320
  • Citation Counts
    22,115
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* Total H Index Rankings

Rankings

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25,842
World Rank
United States
10,949
Country Rank
University of Houston Logo
31
University
Ranking Based On Selection:
6
Fernando Antonio Flor
University of Houston Houston, United States
Engineering & Technology / Nuclear Engineering
Nuclear Phenomenolog

H-Index Metrics

  • H-Index
    76
  • i10 Index
    257
  • Citation Counts
    18,988
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* Total H Index Rankings

Rankings

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29,446
World Rank
United States
12,352
Country Rank
Sandia National Laboratories Logo
6
University
Ranking Based On Selection:
7
Geoff Forden
Sandia National Laboratories New Mexico, United States
Engineering & Technology / Nuclear Engineering
nuclear nonproliferatio

H-Index Metrics

  • H-Index
    74
  • i10 Index
    150
  • Citation Counts
    22,169
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* Total H Index Rankings

Rankings

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30,712
World Rank
Vietnam
10
Country Rank
Vietnam Atomic Energy Institute Logo
1
University
Ranking Based On Selection:
8
Pham Ngoc Dong
Vietnam Atomic Energy Institute Hanoi, Vietnam
Engineering & Technology / Nuclear Engineering
Probabilistic Risk Assessment | Nuclear Safety | Nuclear Engineering | High energy cosmic rays | Astroparticle physics and astronom

H-Index Metrics

  • H-Index
    73
  • i10 Index
    153
  • Citation Counts
    22,832
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* Total H Index Rankings

Rankings

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32,119
World Rank
Brazil
288
Country Rank
Universidade de São Paulo USP Logo
85
University
Ranking Based On Selection:
9
Reynaldo Luiz Victoria
Universidade de São Paulo USP São Paulo, Brazil
Engineering & Technology / Nuclear Engineering
isotopos estaveis | biogeoquimica | ecologia de sistema

H-Index Metrics

  • H-Index
    72
  • i10 Index
    174
  • Citation Counts
    15,806
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* Total H Index Rankings

Rankings

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34,203
World Rank
United States
14,042
Country Rank
University of Tennessee Knoxville Logo
37
University
Ranking Based On Selection:
10
Brian D Wirth
University of Tennessee Knoxville Knoxville, United States
Engineering & Technology / Nuclear Engineering
nuclear fuel and materials behavior | fusion energy | plasma materials interaction

H-Index Metrics

  • H-Index
    70
  • i10 Index
    255
  • Citation Counts
    17,749
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* Total H Index Rankings

Rankings

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34,355
World Rank
United States
14,100
Country Rank
University of Michigan Logo
317
University
Ranking Based On Selection:
11
Fei Gao
University of Michigan Ann Arbor, United States
Engineering & Technology / Nuclear Engineering
Material Science | Radiation Effects in Materials | Multi-scale Computer Simulatio

H-Index Metrics

  • H-Index
    70
  • i10 Index
    367
  • Citation Counts
    21,327
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* Total H Index Rankings

Rankings

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78,798
World Rank
Russia
215
Country Rank
Ural Federal University Logo
5
University
Ranking Based On Selection:
12
Karem Abdelazim Mahmoud
Ural Federal University Yekaterinburg, Russia
Engineering & Technology / Nuclear Engineering
Nuclear Engineerin

H-Index Metrics

  • H-Index
    52
  • i10 Index
    160
  • Citation Counts
    7,155
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* Total H Index Rankings

Rankings

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81,252
World Rank
United States
29,928
Country Rank
Oak Ridge National Laboratory Logo
119
University
Ranking Based On Selection:
13
Thak Sang Byun
Oak Ridge National Laboratory Oak Ridge, United States
Engineering & Technology / Nuclear Engineering
Nuclear Materials | Materials Science | Nuclear Engineerin

H-Index Metrics

  • H-Index
    52
  • i10 Index
    123
  • Citation Counts
    9,822
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* Total H Index Rankings

Rankings

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83,660
World Rank
United Arab Emirates
100
Country Rank
University of Sharjah Logo
27
University
Ranking Based On Selection:
14
Tahar Laoui
University of Sharjah Sharjah, United Arab Emirates
Engineering & Technology / Nuclear Engineering
Nanostructured materials | Nanocomposites | Membranes for water treatment and desalination | Additive manufacturin

H-Index Metrics

  • H-Index
    51
  • i10 Index
    133
  • Citation Counts
    17,134
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* Total H Index Rankings

Rankings

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85,977
World Rank
United States
31,400
Country Rank
University of California Berkeley Logo
513
University
Ranking Based On Selection:
15
Kai Vetter
University of California Berkeley Berkeley, United States
Engineering & Technology / Nuclear Engineering
Applied Nuclear Physics | Radiation Detection | Radiation Imaging | Nuclear Physic

H-Index Metrics

  • H-Index
    51
  • i10 Index
    196
  • Citation Counts
    10,406
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* Total H Index Rankings

Rankings

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87,749
World Rank
United States
32,013
Country Rank
University of California Berkeley Logo
522
University
Ranking Based On Selection:
16
Peter Hosemann
University of California Berkeley Berkeley, United States
Engineering & Technology / Nuclear Engineering
Nuclear Materials | mechanical properties | structural materials | extreme environment

H-Index Metrics

  • H-Index
    50
  • i10 Index
    175
  • Citation Counts
    8,999
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* Total H Index Rankings

Rankings

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95,466
World Rank
United States
34,378
Country Rank
Lawrence Berkeley National Laboratory Logo
205
University
Ranking Based On Selection:
17
La Bernstein
Lawrence Berkeley National Laboratory Berkeley, United States
Engineering & Technology / Nuclear Engineering
nuclear physic

H-Index Metrics

  • H-Index
    49
  • i10 Index
    166
  • Citation Counts
    9,389
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* Total H Index Rankings

Rankings

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100,376
World Rank
Spain
2,753
Country Rank
Universidad de Sevilla Logo
89
University
Ranking Based On Selection:
18
Antonio M. Moro
Universidad de Sevilla Sevilla, Spain
Engineering & Technology / Nuclear Engineering
nuclear reactions | exotic nuclei | halo nuclei | radioactive beams | quantum scattering theor

H-Index Metrics

  • H-Index
    48
  • i10 Index
    117
  • Citation Counts
    5,961
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* Total H Index Rankings

Rankings

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100,868
World Rank
United States
36,024
Country Rank
University of Michigan Logo
792
University
Ranking Based On Selection:
19
Ronald Gilgenbach
University of Michigan Ann Arbor, United States
Engineering & Technology / Nuclear Engineering
plasma | microwav

H-Index Metrics

  • H-Index
    48
  • i10 Index
    174
  • Citation Counts
    8,435
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* Total H Index Rankings

Rankings

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101,017
World Rank
United States
36,080
Country Rank
University of Tennessee System Logo
2
University
Ranking Based On Selection:
20
Lawrence W Townsend
University of Tennessee System Knoxville, United States
Engineering & Technology / Nuclear Engineering
Nuclear collision modeling | space radiation transport and shieldin

H-Index Metrics

  • H-Index
    48
  • i10 Index
    210
  • Citation Counts
    8,395
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* Total H Index Rankings

Rankings

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105,986
World Rank
Brazil
1,821
Country Rank
Universidade de São Paulo USP Logo
519
University
Ranking Based On Selection:
21
Antonio Figueira
Universidade de São Paulo USP São Paulo, Brazil
Engineering & Technology / Nuclear Engineering
Biologia de Planta

H-Index Metrics

  • H-Index
    47
  • i10 Index
    115
  • Citation Counts
    7,073
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* Total H Index Rankings

Rankings

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106,431
World Rank
United States
37,689
Country Rank
Los Alamos National Laboratory Logo
131
University
Ranking Based On Selection:
22
Paul E Koehler
Los Alamos National Laboratory New Mexico, United States
Engineering & Technology / Nuclear Engineering
Nuclear Physics | Nuclear Astrophysics | Nuclear Engineerin

H-Index Metrics

  • H-Index
    47
  • i10 Index
    144
  • Citation Counts
    8,414
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* Total H Index Rankings

Rankings

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111,084
World Rank
United States
38,993
Country Rank
University of Tennessee Knoxville Logo
128
University
Ranking Based On Selection:
23
Steve Skutnik
University of Tennessee Knoxville Knoxville, United States
Engineering & Technology / Nuclear Engineering
Nuclear fuel cycles | nonproliferation | radioactive waste managemen

H-Index Metrics

  • H-Index
    46
  • i10 Index
    76
  • Citation Counts
    18,655
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* Total H Index Rankings

Rankings

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116,566
World Rank
United States
40,662
Country Rank
University of Illinois Urbana Champaign Logo
382
University
Ranking Based On Selection:
24
DN Ruzic
University of Illinois Urbana Champaign Champaign, United States
Engineering & Technology / Nuclear Engineering
Plasma Physics | Plasma Enginnering | Microelectronics | Fusio

H-Index Metrics

  • H-Index
    45
  • i10 Index
    186
  • Citation Counts
    7,230
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* Total H Index Rankings

Rankings

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117,985
World Rank
United States
41,108
Country Rank
Texas A&M University Logo
381
University
Ranking Based On Selection:
25
Jim E Morel
Texas A&M University College Station, United States
Engineering & Technology / Nuclear Engineering

H-Index Metrics

  • H-Index
    45
  • i10 Index
    117
  • Citation Counts
    7,120
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