Related by context. Frequent words. (Click for all words.) 67 positron 66 muon 65 muons 64 positrons 62 hydrogen atom 61 protons 61 electron 61 proton 60 excitons 60 electrons 60 hydrogen atoms 59 particle beams 59 magnetic flux 59 ions 59 atoms 59 photon 59 GeV 59 neutrons 58 gravitational wave 58 magnetization 58 atomic nuclei 57 photons 57 particle 57 atomic particles 57 ionized gas 57 electron beams 56 neutrino 56 alpha particles 56 subatomic particles 56 fermions 56 WIMPs 56 particle beam 56 superfluid 55 cosmic ray 55 neutrinos 55 electron volts 54 Bose Einstein condensate 54 magnetar 54 magnetic fields 54 nuclei 54 angular momentum 54 oxygen atoms 54 ionization 54 ejecta 54 gamma rays 54 cosmic rays 53 analyte 53 deuterium 53 X ray beam 53 FRET 53 atomic nucleus 53 spacetime 53 plasmonic 53 Earth magnetosphere 53 ionized 53 neutron 53 antimatter 53 ferromagnetic 53 oxygen atom 52 photonic crystal 52 subatomic 52 X ray emission 52 laser pulse 52 Brownian motion 52 gravitationally 52 proton beams 52 phonons 52 magnetosphere 52 particles 52 GPa 52 interstellar medium 52 spectroscopic 52 electron spin 52 RHIC 52 Eta Carinae 51 astrophysical 51 quark 51 nanocrystals 51 anion 51 transmission electron microscope 51 spherical 51 quark gluon plasma 51 supernova explosions 51 gravitational 51 molecule 51 dimer 51 quantum dot 51 fullerene 51 interferometer 51 radioactive decay 51 scanning tunneling microscope 51 magnetically 51 electron beam 51 micron sized 51 quasar 51 amplitudes 50 extrasolar planet 50 spectrometry 50 ion beam 50 titanium oxide 50 beamline