Types of radioactive dating
We classify different types of radioactive decay by the radiation produced. Alpha particles, which are attracted to the negative plate and deflected by a relatively small amount, must be positively charged and relatively massive.
Beta particles, which are attracted to the positive plate and deflected a relatively large amount, must be negatively charged and relatively light.
Consequently, the n:p ratio is decreased, and the daughter nuclide lies closer to the band of stability than did the parent nuclide.Cobalt-60 emits γ radiation and is used in many applications including cancer treatment: Positron emission is observed for nuclides in which the n:p ratio is low. Positron decay is the conversion of a proton into a neutron with the emission of a positron.The n:p ratio increases, and the daughter nuclide lies closer to the band of stability than did the parent nuclide.Electron capture occurs when one of the inner electrons in an atom is captured by the atom’s nucleus.
For example, potassium-40 undergoes electron capture: Electron capture occurs when an inner shell electron combines with a proton and is converted into a neutron.
Electron capture has the same effect on the nucleus as does positron emission: The atomic number is decreased by one and the mass number does not change.