Example image of eyePlorer eyePlorer map for 'Carbon-14': Berkeley, California Carbon Franz N. D. Kurie Lawrence Berkeley National Laboratory Martin Kamen Radionuclide Sam Ruben Atomic nucleus Neutron Proton Radiocarbon dating Carbon-12 Carbon-13 Isotope Parts-per notation Half-life Beta decay Nitrogen-14 Atomic mass Atomic mass unit Carbon label Neutron temperature Nitrogen Stratosphere Troposphere Cosmic ray Carbon dioxide Earth's magnetic field Oxygen Ocean Ice Spallation Antineutrino Curie Carbonaceous Radiometric dating University of Chicago Willard Libby Nobel Prize in Chemistry Dendrochronology Speleothem Nuclear weapons testing Accelerator mass spectrometry Tooth enamel Northern Hemisphere Southern Hemisphere Coal Fossil fuel Petroleum Isotopic signature