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alpha particle |
Also found in: Dictionary/thesaurus, Legal, Acronyms, Encyclopedia, Wikipedia, Hutchinson | 0.02 sec. |
alpha particle, a particle emitted from an atom during one kind of radioactive decay. It consists of two protons and two neutrons, the equivalent of a helium nucleus. Ordinarily, alpha particles are a weak form of radiation with a short range and are not considered hazardous unless inhaled or ingested. particle, n a small amount of material. particle, alpha, n (alpha ray, alpha radiation) a positively charged particulate ionizing radiation consisting of helium nuclei (two protons and two neutrons) traveling at high speeds. These rays are emitted from the nucleus of an unstable element. particle, beta, n (beta ray, beta radiation) a particulate ionizing radiation consisting of either negative electrons (negatrons) or positive electrons (positrons) emitted from the nucleus of an unstable element. This phenomenon is called beta decay. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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[alpha]] is the propagation direction of the alpha particle,
followed by ([alpha], n) reactions, can lead to false asymmetries in the
CsI detectors, estimated at the 2 X [10. Each of those putative atoms of element 115 disintegrated within
fractions of a second by spontaneously ejecting an alpha particle, which
contains two protons and two neutrons. 2 MeV (an acknowledged overestimate because of
the infinitely thick source geometry), we calculated a radiation dose
rate averaged over a 50-[micro]m tissue thickness surrounding the
implant (adequate to capture all of the alpha particle energy emitted by
both uranium- and thorium-series isotopes) to be 4. |
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