Radioactive carbon dating wikipedia dating hiv positive
Another type of radioactive decay results in products that vary, appearing as two or more "fragments" of the original nucleus with a range of possible masses.This decay, called spontaneous fission, happens when a large unstable nucleus spontaneously splits into two (or occasionally three) smaller daughter nuclei, and generally leads to the emission of gamma rays, neutrons, or other particles from those products.The nucleus may capture an orbiting electron, causing a proton to convert into a neutron in a process called electron capture.All of these processes result in a well-defined nuclear transmutation.
The carbon 14 present in an organism at the time of its death decays at a steady rate, and so the age of the remains can be calculated from the amount of carbon 14 that is left. The cells of all living things contain carbon atoms that they take in from their environment.
All results were negative until he used uranium salts.