Atomic and Nuclear physics 187 Physics 66 Radiochemistry 45 History 41 Molecular spectroscopy; Nuclear structure; Atomic and Nuclear physics 41 Chemistry 38 Nuclear physics 38 Atomic spectroscopy 36 Atomic structure 36 Atomic physics 29 Journal of physics B 25 Molecular spectroscopy 25 Religion 25 Chemical technology 22 Atomic theory 20 Isotopes 17 Atomic Structure 16 Atoms 16 Quantum theory 15 Atomic Physics 14 Soil science 14 Crop improvement 13 ATOMIC ENERGY 12 Agricultural chemistry 12 Dissertations, Academic (Ph.D) 12 Feminism 12 Nuclear Physics 12 Research 12 Atomic spectra 11 Homescience 11