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Encyclopedia > Beta particle
Alpha radiation consists of helium nuclei and is readily stopped by a sheet of paper. Beta radiation, consisting of electrons, is halted by an aluminium plate. Gamma radiation is eventually absorbed as it penetrates a dense material.

Beta particles are high-energy 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. They are designated by the Greek letter beta (β). Download high resolution version (665x822, 24 KB) Wikipedia does not have an article with this exact name. ... Download high resolution version (665x822, 24 KB) Wikipedia does not have an article with this exact name. ... General Name, Symbol, Number helium, He, 2 Chemical series noble gases Group, Period, Block 18, 1, s Appearance colorless Atomic mass 4. ... Properties The electron is a lightweight fundamental subatomic particle that carries a negative electric charge. ... Properties The electron is a lightweight fundamental subatomic particle that carries a negative electric charge. ... The first detection of the positron in 1932 by Carl D. Anderson The positron is the antiparticle or the antimatter counterpart of the electron. ... Radioactive decay is the set of various processes by which unstable atomic nuclei (nuclides) emit subatomic particles. ... A semi-accurate depiction of the helium atom. ... General Name, Symbol, Number potassium, K, 19 Chemical series alkali metals Group, Period, Block 1, 4, s Appearance silvery white Atomic mass 39. ... In nuclear physics, beta decay (sometimes called neutron decay) is a type of radioactive decay in which a beta particle (an electron or a positron) is emitted. ... Due to technical limitations, some web browsers may not display some special characters in this article. ...

There are two forms of beta decay, β and β+, which respectively give rise to the electron and the positron. Properties The electron is a lightweight fundamental subatomic particle that carries a negative electric charge. ... The first detection of the positron in 1932 by Carl D. Anderson The positron is the antiparticle or the antimatter counterpart of the electron. ...

Unstable atomic nuclei with an excess of neutrons may undergo β decay, where a neutron is converted into a proton, an electron and an electron-type antineutrino (the antiparticle of the neutrino): Properties In physics, the neutron is a subatomic particle with no net electric charge and a mass of 939. ... Properties In physics, the proton (Greek proton = first) is a subatomic particle with an electric charge of one positive fundamental unit (1. ... Corresponding to each kind of particle, there is an associated antiparticle with the same mass and spin. ... The neutrino is an elementary particle. ...

$mbox{n} rightarrow mbox{p} + mbox{e}^- + bar{nu}_{e}$

A W minus Boson is emitted from the nucleus which then decays into an electron and an antineutrino. It does this by converting one of the two up quarks in the proton into a down quark, leaving two down quarks and one up quark (a Neutron) to convert an up quark into a down quark a -1 charge is carried away to observe charge conservation (the W- boson, then the electron, as an up quark carries a charge of +2/3 and the down quark has a charge of -1/3; this quark is said to have undergone a flavor change).

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## Uses

Beta particles can be used to treat health conditions such as eye and bone cancer. As well as being used as tracers. The main element for these jobs is Strontium-90.

'Strontium- 90'

Strontium-90 is used as a radioactive tracer in medical and agricultural studies. The heat generated by strontium-90's radioactive decay can be converted to electricity for long-lived, light-weight power supplies (see Radioisotope Thermoelectric Generator). These are often used in remote locations, such as in navigational beacons, weather stations, and space vehicles. Strontium-90 is also used in electron tubes, as a radiation source in industrial thickness gauges, and for the treatment of eye diseases. Controlled amounts of strontium-90 have been used as a treatment for bone cancer. A radioisotope thermoelectric generator (RTG) is a simple electrical generator which obtains its power from radioactive decay. ...

'Technetium-99'

Technetium-99 is also used as a tracer in medicine as a gamma-free source of beta particles. The half-life of Technetium-99 is relatively low, meaning that the damage to the body is limited.

## References

www.wikapediea.com

Results from FactBites:

 Alpha particle - Wikipedia, the free encyclopedia (876 words) They consist of two protons and two neutrons bound together into a particle identical to a helium nucleus; hence, it can be written as He Alpha particles are emitted by radioactive nuclei such as uranium or radium in a process known as alpha decay. In contrast to beta decay, alpha decay is mediated by the strong nuclear force. When an alpha particle is emitted, the atomic mass of an element goes down by roughly 4 amu, due to the loss of 4 nucleons.
 Beta particle - definition of Beta particle in Encyclopedia (263 words) Beta particles are high-energy electrons emitted by certain types of radioactive nuclei such as potassium-40. Beta decay is mediated by the weak nuclear force. Beta particles can be stopped by a few millimeters of aluminum and its flight is ten times farther than an alpha particle although it ionizes a tenth less than an alpha particle.
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