The alpha particle is emitted by certain radioactive elements as they decay to a stable element. It consists of two protons and two neutrons; it is positively charged. The element that undergoes "alpha decay" changes into a new element whose atomic...

Alpha radiation is the stream of alpha particles emitted when radioactive materials disintegrate. When radioactive material breaks down, there is a loss in the total mass of the products. According to the law of conservation of mass-energy there must...

The earliest studies of nuclear radiation suggested that it consisted of at least one kind of charged particle. Various experiments showed that nuclear radiation can be deflected by a magnetic field. This finding confirms that at least some part of the...

A particle emitted by certain kinds of radioactive materials. An alpha particle is identical to the nucleus of a helium atom, consisting of two protons and two neutrons. Some common alpha-particle emitters are uranium-235, uranium-238, radium-226, and...

Alpha particles (named after and denoted by the first letter in the Greek alphabet, α) consist of two protons and two neutrons bound together into a particle identical to a helium nucleus; hence, it can be written as He2+ or 42He. They are a highly...