Advanced dating technique
Radioactive decay can be used as a “clock” because it is unaffected by physical (e.g. For instance, the amount varies according to how many cosmic rays reach Earth.This is affected by solar activity and the earth’s magnetic field.Isotopes of a particular element have the same number of protons in their nucleus, but different numbers of neutrons.This means that although they are very similar chemically, they have different masses.
In the years after WWII, there was a brisk business in counterfeit German and Russian arms.
In general, weapon dating and identification is divided into broad areas of expertise, such as blade weapons or firearms.
Within these general categories, a specialist may work exclusively in a field as narrow as swords of the American Civil War.
Professor Willard Libby produced the first radiocarbon dates in 1949 and was later awarded the Nobel Prize for his efforts.
Radiocarbon dating works by comparing the three different isotopes of carbon.
The total mass of the isotope is indicated by the numerical superscript.