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Topic: Beta particle

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  Alpha particle - Wikipedia, the free encyclopedia
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.
en.wikipedia.org /wiki/Alpha_particle   (876 words)

 Beta particle: Facts and details from Encyclopedia Topic   (Site not responding. Last check: 2007-11-07)
The beta particles emitted are a form of ionizing radiation also known as beta rays.
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)...
Beta particles may be stopped by a few mil (1/1000 in.) of aluminum and its flight is ten times farther than an alpha particle although it ionizes a tenth less than an alpha particle.
www.absoluteastronomy.com /encyclopedia/b/be/beta_particle.htm   (667 words)

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