- Nuclear Energy 272
- Nuclear Physics, Heavy Ions, Hadrons 208
- Measurement Science and Instrumentation 205
- Astronomy, Astrophysics and Cosmology 201
- Elementary Particles, Quantum Field Theory 201
- Quantum Field Theories, String Theory 201
- Particle Acceleration and Detection, Beam Physics 66
- Particle and Nuclear Physics 60
- Effects of Radiation/Radiation Protection 4
- Quality Control, Reliability, Safety and Risk 4
- Systems and Data Security 4
- Nuclear Fusion 1
- Nuclear Medicine 1
- Security Science and Technology 1
- Waste Management/Waste Technology 1