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Government institution · Paris · France

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

In research, Commissariat à l'Énergie Atomique et aux Énergies Alternatives stands highest in Physical Sciences (#355 of 12,888 worldwide), Physics and Astronomy (#127 of 1,646 worldwide) and Life Sciences (#973 of 7,800 worldwide), 2022–2025. Relative to its size it is most specialised in Radiation, Nuclear and High Energy Physics and Condensed Matter Physics — Radiation is 16.5× its share of world research.

cea.frROR OpenAlex
World rank, 2022–2025
#534
of 28,054 · #166 all time
Rank in France
#7
of 1,422
Research works
38k
▼ 19% vs 2013–17
Citations
1.1M
28.2 per fractional work
Top-10% rate
17.5%
record average 16.5%
Open access
38%
world 28%

What is Commissariat à l'Énergie Atomique et aux Énergies Alternatives known for in research?

The fields where it stands highest, 2022–2025, ranked among every institution above the floor in each field.

FieldWorld rankWhere that sitsTop-10% rateWorksAll time
Physical SciencesDomain #355 of 12,888 16.3%2,973 #89
Physics and AstronomyField #127 of 1,646 28.2%657 #58
Life SciencesDomain #973 of 7,800 24.3%387 #544
EngineeringField #906 of 6,636 10.7%1,184 #231
Biochemistry, Genetics and Molecular BiologyField #628 of 3,579 21.5%231 #430
Nuclear and High Energy PhysicsSubfield #48 of 263 43.7%185 #39
Environmental ScienceField #754 of 3,551 25.3%161 #402
Astronomy and AstrophysicsSubfield #99 of 443 34.8%123 #66
Earth and Planetary SciencesField #278 of 1,209 26.1%118 #133
Materials ScienceField #591 of 2,468 10.4%372 #108

Each strip is that field’s whole ranked pool, with the notch where Commissariat à l'Énergie Atomique et aux Énergies Alternatives sits in it, in the colour of the band that rank falls in. The track under the rate is the rate itself: it carries no world mark, because the world rate differs by field (from about 6% to 21% in this record).

Which of those standings moved

The same fields on both windows: where it stood over the whole record, and where it stands in 2022–2025. The distance is the story, and it is the one thing the two rank columns above cannot show.

  1. Physical Sciences#89 #355
  2. Physics and Astronomy#58 #127
  3. Life Sciences#544 #973
  4. Engineering#231 #906
  5. Biochemistry, Genetics and Molecular Biology#430 #628
  6. Nuclear and High Energy Physics#39 #48
  7. Environmental Science#402 #754
  8. Astronomy and Astrophysics#66 #99
  9. Earth and Planetary Sciences#133 #278
  10. Materials Science#108 #591
all time2022–2025, better2022–2025, worse

A dot further right is a better standing. Fields it was not ranked in over the whole record are left out.

What does Commissariat à l'Énergie Atomique et aux Énergies Alternatives specialise in?

Where its research is concentrated relative to its size: Radiation takes 16.5× the share of its output that it takes of world research.

  1. RadiationSubfield · 84.5 works17×
  2. Nuclear and High Energy PhysicsSubfield · 184.8 works16×
  3. Condensed Matter PhysicsSubfield · 49.3 works8.3×
  4. Physics and AstronomyField · 657.3 works8.0×
  5. Atomic and Molecular Physics, and OpticsSubfield · 172.9 works6.5×
← less than its size predicts1×more →

Location quotient, a volume reading rather than an impact one. It surfaces small, lopsided specialities.

Field profile

Location quotient across every field it publishes in: outside the ring is more than an institution of this size would be expected to publish, inside it is less.

Agricultural and Biological Sciences: 0.32× its world share, 57 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 1.17× its world share, 231 worksBiochemistry, Geneti…Immunology and Microbiology: 0.61× its world share, 23 worksImmunology and Micro…Neuroscience: 1.17× its world share, 71 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 0.48× its world share, 6 worksPharmacology, Toxico…Chemical Engineering: 1.73× its world share, 22 worksChemical EngineeringChemistry: 1.95× its world share, 114 worksChemistryComputer Science: 0.87× its world share, 251 worksComputer ScienceEarth and Planetary Sciences: 2.03× its world share, 118 worksEarth and Planetary …Energy: 1.62× its world share, 55 worksEnergyEngineering: 2.12× its world share, 1,184 worksEngineeringEnvironmental Science: 0.87× its world share, 161 worksEnvironmental ScienceMaterials Science: 2.87× its world share, 372 worksMaterials ScienceMathematics: 0.87× its world share, 38 worksMathematicsPhysics and Astronomy: 7.96× its world share, 657 worksPhysics and AstronomyDentistry: 0.05× its world share, 1 worksDentistryHealth Professions: 0.15× its world share, 15 worksHealth ProfessionsMedicine: 0.31× its world share, 222 worksMedicineNursing: 0.24× its world share, 4 worksNursingVeterinary: 0.21× its world share, 1 worksVeterinaryArts and Humanities: 0.17× its world share, 18 worksArts and HumanitiesBusiness, Management and Accounting: 0.07× its world share, 8 worksBusiness, Management…Decision Sciences: 0.57× its world share, 20 worksDecision SciencesEconomics, Econometrics and Finance: 0.08× its world share, 6 worksEconomics, Econometr…Psychology: 0.15× its world share, 17 worksPsychologySocial Sciences: 0.09× its world share, 41 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Physics and Astronomy, 8.0×. Every wedge is a field page.

Who are the top researchers at Commissariat à l'Énergie Atomique et aux Énergies Alternatives?

Ranked on the composite score, Gaël Varoquaux, I. A. Grenier and S. Escoffier lead among researchers whose main affiliation is Commissariat à l'Énergie Atomique et aux Énergies Alternatives.

  1. 1 Gaël Varoquaux France · #1,504 worldwide 2k citations · 109 works
  2. 2 I. A. Grenier France · #4,819 worldwide 2k citations · 95 works
  3. 3 S. Escoffier France · #4,983 worldwide 1.3k citations · 87 works
  4. 4 A. Hornstrup France · #5,371 worldwide 1.8k citations · 122 works
  5. 5 H. P. Beck France · #7,167 worldwide 7.5k citations · 471 works
  6. 6 X. Li France · #10,276 worldwide 2.5k citations · 48 works
  7. 7 C. E. Pérez Lara France · #11,425 worldwide 1.4k citations · 91 works
  8. 8 Christophe Grojean France · #12,692 worldwide 895 citations · 50 works
  9. 9 S. Fegan France · #12,909 worldwide 1.2k citations · 99 works
  10. 10 F. Bournaud France · #14,910 worldwide 1.2k citations · 64 works
All ranked researchers at Commissariat à l'Énergie Atomique et aux Énergies Alternatives

Which keywords describe research at Commissariat à l'Énergie Atomique et aux Énergies Alternatives?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Tomography, Density Functional Theory, Crystal Growth, Oxidation Resistance, Molten Salt, Nuclear Reactor, Turbulence and Hydrogen Embrittlement.

▲ more of its work than of the world’s◆ about the world’s share▼ less than the world’s

Size is fractional works in 2022–2025 in the topics tagged with each word; colour is the word's share of this institution's work against its share of the world's. The 40 words are chosen for being large and distinctive. Each links to the topic it comes from most.

All 40 words, with their numbers
  1. Tomography73▲ 11×5 topics
  2. Crystal Growth63▲ 6.0×12 topics
  3. Biosensors61▲ 3.2×12 topics
  4. Density Functional Theory57▲ 15×6 topics
  5. Oxidation Resistance54▲ 14×3 topics
  6. Molten Salt53▲ 45×1 topic
  7. Nuclear Reactor53▲ 45×1 topic
  8. Data Analysis53▲ 5.2×7 topics
  9. Turbulence53▲ 16×5 topics
  10. Hydrogen Embrittlement52▲ 16×3 topics
  11. High Temperature Behavior49▲ 22×2 topics
  12. Small-Angle Scattering49▲ 24×2 topics
  13. Integrated Circuits46▲ 7.9×3 topics
  14. Accident Tolerant Fuels46▲ 34×1 topic
  15. Fuel Cladding46▲ 34×1 topic
  16. Solar Cells44▲ 5.8×7 topics
  17. Radiography43▲ 31×2 topics
  18. Dark Matter43▲ 10×4 topics
  19. Neutron Activation Analysis43▲ 32×1 topic
  20. Neutron Imaging43▲ 32×1 topic
  21. Raman Lasers42▲ 9.9×2 topics
  22. Superconductivity42▲ 6.6×9 topics
  23. Spectroscopy40▲ 6.5×11 topics
  24. Nonlinear Optics40▲ 9.8×4 topics
  25. Diagnostics39▲ 13×3 topics
  26. Nanoelectronics39▲ 12×2 topics
  27. Tokamak38▲ 48×1 topic
  28. Transport38▲ 32×1 topic
  29. Actinides38▲ 19×2 topics
  30. Raman Spectroscopy37▲ 5.1×6 topics
  31. Photovoltaics35▲ 5.8×4 topics
  32. Nanowires34▲ 6.5×5 topics
  33. Nucleosynthesis33▲ 18×3 topics
  34. Atomic Layer Deposition33▲ 13×1 topic
  35. High-k Dielectrics33▲ 13×1 topic
  36. Semiconductor Devices33▲ 12×2 topics
  37. Bioremediation32▲ 7.0×7 topics
  38. Molecular Dynamics Simulations32▲ 20×2 topics
  39. Fiber Lasers32▲ 8.8×3 topics
  40. Black Holes31▲ 8.8×3 topics

Which research topics does Commissariat à l'Énergie Atomique et aux Énergies Alternatives publish most on?

By volume in 2022–2025: Nuclear reactor physics and engineering, Nuclear Materials and Properties, Nuclear Physics and Applications and Magnetic confinement fusion research.

Nuclear reactor physics …53Nuclear reactor physics and engineering: 53 fractional worksNuclear Materials and Pr…46Nuclear Materials and Properties: 46 fractional worksNuclear Physics and Appl…43Nuclear Physics and Applications: 43 fractional worksMagnetic confinement fus…38Magnetic confinement fusion research: 38 fractional worksSemiconductor materials and devices: 33 fractional worksRadioactive element chemistry and processing: 28 fractional worksFusion materials and tec…27Fusion materials and technologies: 27 fractional worksPhotonic and Optical Dev…27Photonic and Optical Devices: 27 fractional worksSuperconducting Material…25Superconducting Materials and Applications: 25 fractional worksRadiation Detection and …22Radiation Detection and Scintillator Technologies: 22 fractional works
Aerospace EngineeringMaterials ChemistryRadiationNuclear and High Energy Physics3 others

Area is fractional works; colour is the subfield each topic belongs to.

  1. 1 Nuclear reactor physics and engineering Aerospace Engineering 53 works
  2. 2 Nuclear Materials and Properties Materials Chemistry 46 works
  3. 3 Nuclear Physics and Applications Radiation 43 works
  4. 4 Magnetic confinement fusion research Nuclear and High Energy Physics 38 works
  5. 5 Semiconductor materials and devices Electrical and Electronic Engineering 33 works
  6. 6 Radioactive element chemistry and processing Inorganic Chemistry 28 works
  7. 7 Fusion materials and technologies Materials Chemistry 27 works
  8. 8 Photonic and Optical Devices Electrical and Electronic Engineering 27 works
  9. 9 Superconducting Materials and Applications Biomedical Engineering 25 works
  10. 10 Radiation Detection and Scintillator Technologies Radiation 22 works

How open and international is its research?

Against the world’s own shares — the tick on each track. Both are shares of its output, so they sit on one scale and can be read against each other as well as against the world.

openly available37.5%not open62.5%

World: 28% of research is openly available.

with international co-authors30.7%domestic only69.3%

World: 19% is written across borders.

How has Commissariat à l'Énergie Atomique et aux Énergies Alternatives's research output changed?

Output in 2018–2022 was 19% lower than in 2013–2017.

1990200020102020
grewheldshrank

The same series as a ribbon — one cell per year, darker for more. The line above answers how much; this answers when.

Other research institutions in Paris

All research institutions in Paris

Research measures only: rankings here say nothing about teaching, admissions or student experience. Comparable institutions and collaboration partners are in the interactive view on the map.