What type of radiation does carbon dating use
The strength of the Earth's magnetic field affects the amount of cosmic rays entering the atmosphere.
A stronger magnetic field deflects more cosmic rays away from the Earth.
Beta particles ionise atoms that they pass, but not as strongly as alpha particles do. We don't find pure gamma sources - gamma rays are emitted alongside alpha or beta particles.
Strictly speaking, gamma emission isn't 'radioactive decay' because it doesn't change the state of the nucleus, it just carries away some energy. You can think of different isotopes of an atom being different "versions" of that atom. It has 6 protons and 6 neutrons - we call it "carbon-12" because it has an atomic mass of 12 (6 plus 6).
That is, they take up less than would be expected and so they test older than they really are.
Furthermore, different types of plants discriminate differently.
The amount of cosmic rays reaching the Earth varies with the sun's activity, and with the Earth's passage through magnetic clouds as the solar system travels around the Milky Way galaxy.
This is the atom we look for when we're carbon dating an object.
So isotopes of an atom have the same number of protons, but a different number of neutrons.
Clearly, such huge time periods cannot be fitted into the Bible without compromising what the Bible says about the goodness of God and the origin of sin, death and suffering—the reason Jesus came into the world (See Six Days? He said, This only makes sense with a time-line beginning with the creation week thousands of years ago.
It makes no sense at all if man appeared at the end of billions of years.