Radiation consisting of helium nuclei that are discharged by radioactive disintegration of some heavy elements, including uranium-238, radium-226, and plutonium-239. Alpha, the first letter of the Greek alphabet, is written as .
ionizing, particulate radiation having low penetrating power.
This is the radiation caused by the decay of large atoms. The particles given off are the Helium Nuclei (i.e. 2 protons and 2 neutrons, see the nucleus of the Atomic Structure for an illustration).
the radiation of alpha particles during radioactive decay
Alpha rays consist of nuclei of the element helium and carry a positive charge. Penetrates the least, but does great damage in a small area. (see radiation)
The radiation consist of alpha particle emitted by certain radioactive elements.
A positively charged particle ejected spontaneously from the nuclei of some radioactive elements. It is identical to a helium nucleus that has a mass number of four and an electrostatic charge of +2. It has low-effect within a short time after exposure. Low penetrating power and short range. The most energetic alpha particle will generally fail to penetrate the skin. Alphas are hazardous when an alpha-emitting isotope is introduced into the body.
The most energetic but least penetrating form of radiation. It can be stopped by a sheet of paper and cannot penetrate human skin. However, if an alpha-emitting isotope is inhaled or ingested, it will cause highly concentrated local damage. Alpha-emitting radioactive material at the site originates from nuclear fuel cladding failure at the Haddam Neck plant.
The least penetrating type of nuclear radiation; not considered dangerous unless alpha-contaminated particles enter the body.
An emission of alpha particles (helium nuclei) from a material undergoing nuclear transformation.
A stream of fast-moving helium nuclei. This is a strongly ionizing radiation with very weak penetration (e.g. cannot penetrate a piece of paper).
Radiation consisting of helium nuclei (atomic wt. 4, atomic number 2) that are discharged by radioactive disintegration of some heavy elements, including uranium-238, radium-226, and plutonium-239.
Radiation consisting of alpha particles, which are each made from two protons and two neutrons, and are identical to helium nuclei. Radioactivity
Radiation with a long wavelength with little penetrating strength that can be stopped by paper, but can also be carried by air currents and cause cancer. An example is radon gas, which may be present in the mining area.