Nuclear Physics terms starting with A

9 terms

1. Absorbed dose Energy imparted to a body by radiation, measured per unit mass (kg) of tissue.
2. Absorber The component of a solar thermal collector that absorbs solar radiation and converts it to heat, or, as in a solar photovoltaic device, the material that…
3. activity The number of transformations that take place each second in a given amount of radioactive material.
4. Alpha Particle A positively charged particle, indistinguishable from a helium atom nucleus and consisting of two protons and two neutrons.
5. Alpha particle (alpha radiation, alpha ray) A positively charged particle (a Helium-4 nucleus) made up of two neutrons and two protons.
6. alpha radiation Same as alpha particle.
7. Atom A particle of matter indivisible by chemical means. It is the fundamental building block of elements.
8. Atomic number The number assigned to each element on the basis of the number of protons found in the element's nucleus.
9. Atomic weight (atomic mass) Approximately the sum of the number of protons and neutrons found in the nucleus of an atom.