EntityQ16040784· pop 7· linked from 9 articlesnuclear clockSign in to saveClock based on an atomic nucleus instead of an atomConnectionsion trapEntityPhysical Review LettersEntityisotope of thoriumEntityScience NewsEntitynitrogenEntityargonEntityInternational Standard Book NumberEntitythoriumEntityultraviolet radiationEntityionEntityatomic nucleusEntityelectromagnetic radiationEntitylaserEntitydigital object identifierEntityInternational Standard Serial NumberEntitygamma rayEntityradio waveEntityspectroscopyEntitymicrowaveEntityhalf-lifeEntityCategoriesAtomic clocksNuclear physicsThorium