Science Explorer Interactive view Map
Research facility · Sofia · Bulgaria

Institute for Nuclear Research and Nuclear Energy

In research, Institute for Nuclear Research and Nuclear Energy stands highest in Physical Sciences (#6,994 of 12,888 worldwide), 2022–2025. Relative to its size it is most specialised in Physics and Astronomy — Physics and Astronomy is 19.0× its share of world research.

inrne.bas.bgROR OpenAlex
World rank, 2022–2025
#13,283
of 28,054 · #5,785 all time
Rank in Bulgaria
#28
of 92
Research works
1.5k
▼ 11% vs 2013–17
Citations
19k
12.9 per fractional work
Top-10% rate
14.2%
record average 16.5%
Open access
36%
world 28%

What is Institute for Nuclear Research and Nuclear Energy 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 #6,994 of 12,888 15.0%92 #3473

Each strip is that field’s whole ranked pool, with the notch where Institute for Nuclear Research and Nuclear Energy 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).

What does Institute for Nuclear Research and Nuclear Energy specialise in?

Where its research is concentrated relative to its size: Physics and Astronomy takes 19.0× the share of its output that it takes of world research.

  1. Physics and AstronomyField · 42.4 works19×
← 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: 0.16× its world share, 1 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.11× its world share, 1 worksBiochemistry, Geneti…Pharmacology, Toxicology and Pharmaceutics: 0.08× its world share, 0 worksPharmacology, Toxico…Chemistry: 1.39× its world share, 2 worksChemistryComputer Science: 0.70× its world share, 6 worksComputer ScienceEarth and Planetary Sciences: 1.85× its world share, 3 worksEarth and Planetary …Energy: 4.10× its world share, 4 worksEnergyEngineering: 1.35× its world share, 20 worksEngineeringEnvironmental Science: 0.44× its world share, 2 worksEnvironmental ScienceMaterials Science: 2.20× its world share, 8 worksMaterials ScienceMathematics: 4.58× its world share, 5 worksMathematicsPhysics and Astronomy: 18.99× its world share, 42 worksPhysics and AstronomyHealth Professions: 0.61× its world share, 2 worksHealth ProfessionsMedicine: 0.10× its world share, 2 worksMedicineNursing: 0.14× its world share, 0 worksNursingArts and Humanities: 0.09× its world share, 0 worksArts and HumanitiesBusiness, Management and Accounting: 0.05× its world share, 0 worksBusiness, Management…Decision Sciences: 0.87× its world share, 1 worksDecision SciencesEconomics, Econometrics and Finance: 0.31× its world share, 1 worksEconomics, Econometr…Psychology: 0.01× its world share, 0 worksPsychologySocial Sciences: 0.09× its world share, 1 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Physics and Astronomy, 19.0×. Every wedge is a field page.

Who are the top researchers at Institute for Nuclear Research and Nuclear Energy?

Ranked on the composite score, P. Petkov, Иван Тодоров and V. B. Petkova lead among researchers whose main affiliation is Institute for Nuclear Research and Nuclear Energy.

  1. 1 P. Petkov Bulgaria · #265,465 worldwide 236 citations · 56 works
  2. 2 Иван Тодоров Bulgaria · #314,269 worldwide 302 citations · 80 works
  3. 3 V. B. Petkova Bulgaria · #355,071 worldwide 158 citations · 17 works
  4. 4 W. Andrejtscheff Bulgaria · #370,451 worldwide 118 citations · 28 works
  5. 5 D. Tonev Bulgaria · #498,326 worldwide 135 citations · 40 works
  6. 6 Nikolay Nikolov Bulgaria · #517,129 worldwide 102 citations · 35 works
  7. 7 I.Zh. Petkov Bulgaria · #813,591 worldwide 22 citations · 15 works
  8. 8 G. Asova Bulgaria · #881,565 worldwide 22 citations · 20 works
  9. 9 D. Bakalov Bulgaria · #953,737 worldwide 78 citations · 29 works
  10. 10 Lachezar S. Georgiev Bulgaria · #1,086,154 worldwide 59 citations · 15 works
All ranked researchers at Institute for Nuclear Research and Nuclear Energy

Which keywords describe research at Institute for Nuclear Research and Nuclear Energy?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Supernovae, General Relativity, Dark Energy, Cosmic Microwave Background, Cosmological Parameters, Nucleosynthesis, Renewable Energy and Quantum Gravity.

▲ 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. Supernovae6▲ 77×2 topics
  2. General Relativity6▲ 87×2 topics
  3. Renewable Energy6▲ 4.0×16 topics
  4. Dark Energy6▲ 87×2 topics
  5. Cosmic Microwave Background6▲ 98×1 topic
  6. Cosmological Parameters6▲ 98×1 topic
  7. Nucleosynthesis4▲ 91×3 topics
  8. Quantum Gravity4▲ 50×4 topics
  9. Black Holes4▲ 40×3 topics
  10. Dark Matter4▲ 31×4 topics
  11. Tomography4▲ 20×2 topics
  12. Data Analysis4▲ 13×2 topics
  13. Neutron Imaging3▲ 94×1 topic
  14. Small-Angle Scattering3▲ 62×1 topic
  15. Molten Salt3▲ 97×1 topic
  16. Nuclear Reactor3▲ 97×1 topic
  17. Cohomology3▲ 68×2 topics
  18. Density Functional Theory3▲ 29×3 topics
  19. Lattice QCD3▲ 47×2 topics
  20. Nuclear Forces3▲ 151×1 topic
  21. Nuclear Structure3▲ 151×1 topic
  22. Oxidation Resistance3▲ 26×3 topics
  23. Quantum Entanglement3▲ 42×2 topics
  24. String Theory3▲ 47×2 topics
  25. High Temperature Behavior3▲ 44×2 topics
  26. Particle Physics3▲ 34×2 topics
  27. Quantum Information3▲ 22×3 topics
  28. Raman Spectroscopy3▲ 13×4 topics
  29. Accident Tolerant Fuels2▲ 67×1 topic
  30. Field Theories2▲ 56×1 topic
  31. Fuel Cladding2▲ 67×1 topic
  32. Holographic2▲ 56×1 topic
  33. Reliability Evaluation2▲ 49×3 topics
  34. Entanglement2▲ 16×3 topics
  35. Nuclear Graphite2▲ 104×1 topic
  36. Oxidation Behavior2▲ 37×1 topic
  37. Cosmology2▲ 33×3 topics
  38. Gravitational Waves2▲ 37×2 topics
  39. Nonlinear Equations2▲ 15×2 topics
  40. Renormalization Group2▲ 35×2 topics

Which research topics does Institute for Nuclear Research and Nuclear Energy publish most on?

By volume in 2022–2025: Cosmology and Gravitation Theories, Nuclear Physics and Applications, Nuclear reactor physics and engineering and Nuclear physics research studies.

Cosmology and Gravitation Theories: 6 fractional worksNuclear Physics and Applications: 3 fractional worksNuclear reactor physics …3Nuclear reactor physics and engineering: 3 fractional worksNuclear physics research…3Nuclear physics research studies: 3 fractional worksNuclear Materials and Properties: 2 fractional worksBlack Holes and Theoretical Physics: 2 fractional worksGraphite, nuclear techno…2Graphite, nuclear technology, radiation studies: 2 fractional worksQuantum Chromodynamics and Particle Interactions: 2 fractional worksAdvanced Topics in Algebra: 2 fractional worksNonlinear Waves and Solitons: 2 fractional works
Astronomy and AstrophysicsRadiationAerospace EngineeringNuclear and High Energy Physics3 others

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

  1. 1 Cosmology and Gravitation Theories Astronomy and Astrophysics 6 works
  2. 2 Nuclear Physics and Applications Radiation 3 works
  3. 3 Nuclear reactor physics and engineering Aerospace Engineering 3 works
  4. 4 Nuclear physics research studies Nuclear and High Energy Physics 3 works
  5. 5 Nuclear Materials and Properties Materials Chemistry 2 works
  6. 6 Black Holes and Theoretical Physics Nuclear and High Energy Physics 2 works
  7. 7 Graphite, nuclear technology, radiation studies Materials Chemistry 2 works
  8. 8 Quantum Chromodynamics and Particle Interactions Nuclear and High Energy Physics 2 works
  9. 9 Advanced Topics in Algebra Algebra and Number Theory 2 works
  10. 10 Nonlinear Waves and Solitons Statistical and Nonlinear Physics 2 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 available36.2%not open63.8%

World: 28% of research is openly available.

with international co-authors39.0%domestic only61.0%

World: 19% is written across borders.

How has Institute for Nuclear Research and Nuclear Energy's research output changed?

Output in 2018–2022 was 11% 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 Sofia

All research institutions in Sofia

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.