A beta particle is: a particle of nuclear radiation that is a fast electron. Animated gif: click here It has a mass of 0.000055 u (see atomic mass unit) Being of tiny mass (even on a nuclear scale) and having only a single negative charge its ionising power is low compared to the alpha particle. As its ionising power is low it can penetrate quite deeply into matter before its energy has been used up. Its penetrating power is therefore moderate (absorbed by 1m air, 0.1 mm lead or 3mm aluminium sheet). When a nucleus has too many neutrons, it tends to beta decay. When beta decay occurs a neutron within the nucleus emits the particle and changes into a proton. Therefore the proton number increases but the nucleon number stays the same (only now you have one more proton and one less neutron!). The resulting daughter nucleus is of an element 1 position to the right of the 'parent' in the periodic table. Its antiparticle is the positron. The following symbols are commonly in use
an electrically charged ( - ) particle emitted from some radioactive chemicals. It has the mass of an electron. Krypton 85, emitted from nuclear power plants, is a strong beta emitter. Beta particles can cause ionisation.
(often designated beta rays) Charged particles emitted from a radioactive atom. These particles are identical except for their charge. The charge is classified as positive (positron) or negative (electrons or negatron).
A high-speed particle emitted from the nucleus, which is identical to an electron. They can have a –1 or +1 charge and are effectively shielded by thin layers of metal or plastic. Beta particles are generally only hazardous when they are internally deposited.
A charged particle emitted from the nucleus of an atom and having a mass and charge equal in magnitude to those of the electron. Beta particles can be stopped by aluminum. They pose a serious direct or external radiation threat and can be lethal depending on the amount received.
Beta particles are similar to electrons except they come from the atomic nucleus and are not bound to any atom. Beta particles cannot travel very far from their radioactive source. For example, they can travel only about one half an inch in human tissue, and they may travel a few yards in air. They are not capable of penetrating something as thin as a book or a pad of paper.
An electron or positron emitted by certain radioactive nuclei. Beta particles can be stopped by aluminum.They can pose a serious direct or external radiation threat and can be lethal depending on the amount received.They also pose a serious internal radiation threat if inhaled or ingested.
An elementary particle emitted from a nucleus during radioactive decay, with a single electrical charge and a mass equal to 1/1837 of that of a proton. A negatively charged beta particle is identical to an electron. A positively charged beta particle is called a positron. Beta radiation may cause skin burns, and beta emitters are harmful if they enter the body. Beta particles, however, are easily stopped by a thin sheet of metal.
A charged particle of very small mass emitted spontaneously from the nuclei of certain radioactive elements. Most (if not all) of direct fission products emit (negative) beta particles. Physically, the beta particle is identical with an electron moving at high velocity. They normally can be stopped by the skin or a very thin sheet of metal. See; Beta Decay, Electron, Fission Products, Radioactivity.
An electron of either positive charge (ß+) or negative charge (ß-), which has been emitted by an atomic nucleus or neutron in the process of a transformation. Beta particles are more penetrating than alpha particles but less than gamma rays or x-rays.
(ß-) An electron emitted by an unstable nucleus, when a neutron decays into a proton and an electron. In some cases, beta radiation consists of positrons ("antielectrons" which are identical to electrons but carry a +1 charge.") Note that beta particles are created in nuclear decay; they do not exist as independent particles within the nucleus.
A negatively charged particle, emitted by certain radioactive materials. Beta particles have the same properties (mass and charge) as electrons. They can travel in the air for a distance of a few feet and can pass through a sheet of paper. They can be shielded by aluminum foil or glass.
A light particle produced by radioactive decay. It can be either positively charged (positron) or negatively charged (negatron), although the latter is more often found. A negative beta particle is identical to an electron.
(Or Î² particle.) Physically indistinguishable from the electron (or positron) but usually restricted to products in nuclear reactions (beta decay). The term was coined by Ernest Rutherford, who discovered that the ionizing radiation emitted by uranium consisted of "at least two distinct types . . . one that is very readily absorbed . . . the Î± radiation, and the other of a more penetrative character . . . the Î² radiation." Kinetic energies of beta particles range from tens of thousands to millions of electron volts. Because either electrons or positrons are emitted in beta decay, the term beta particle, a relic of an era in which its identity was unknown, is falling into disuse. See alpha particle, gamma ray. Boorse, H. A., and L. Motz, 1966: The World of the Atom, Vol. I, 437â€“445.
Beta particles are high-energy, high-speed electrons or positrons emitted by certain types of radioactive nuclei such as potassium-40. The beta particles emitted are a form of ionizing radiation also known as beta rays. The production of beta particles is termed beta decay.