Related by context. Frequent words. (Click for all words.) 71 atomic nuclei 67 hydrogen atoms 65 nuclei 65 oxygen atoms 65 ions 64 neutrons 64 atoms 64 electrons 62 photons 61 particles 61 magnetic fields 61 fermions 60 phonons 60 calcium ions 60 atomic particles 60 laser pulse 60 muons 59 proton 59 hydrogen atom 59 superfluid 58 protons 58 electron 58 deuterium 58 subatomic particles 58 Earth magnetosphere 58 vortices 58 dimer 57 cosmic ray 57 ionized 57 radiative 57 angular momentum 57 photon 56 electron spin 56 positrons 56 nanocrystals 56 molecules 56 quark gluon plasma 55 gravitationally 55 laser pulses 55 substorms 55 Electrons 55 interstellar medium 55 neutron star 55 galaxy clusters 55 gamma rays 55 organic molecules 55 magnetic particles 55 magnetosphere 55 radioactive decay 55 supernova explosions 55 magnetization 54 lithium ions 54 reactants 54 magnetic nanoparticles 54 adsorbed 54 atomic nucleus 54 nanocrystal 54 X ray emission 54 filaments 54 carbon atom 54 neutron stars 54 chemical reactions 54 spacetime 54 gravitational waves 53 vibrational 53 gravitational wave 53 dwarf galaxy 53 crystals 53 silicates 53 neutrino 53 magnetar 53 chirality 53 coronal mass ejections 53 cosmic rays 52 particle 52 water vapor 52 spectra 52 nanospheres 52 infrared radiation 52 oscillations 52 superposition 52 ejecta 51 neutrinos 51 brown dwarfs 51 hydroxyl 51 interstellar dust 51 microcapsules 51 atom 51 waveguides 51 dynamical 51 supermassive black holes 51 nanotubes 51 molecule 51 ferromagnetic 51 Neutrinos 51 ion 51 dust particles 51 gravitational 50 pulsations 50 resonant frequency 50 nanometer sized