Lyman alpha emitter - Wikipedia, the free encyclopedia
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Lyman alpha emitters (LAEs) are a type of distant galaxy that emits Lyman alpha radiation. They are extremely distant and because of the finite travel time of light they are glimpses of the past hist...
en.wikipedia.org/wiki/Lyman_alpha_emitter
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Alpha decay - Wikipedia, the free encyclopedia
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Alpha decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle, and thereby transforms (or 'decays') into an atom with a mass number 4 less and atomic number 2 less. Fo...
en.wikipedia.org/wiki/Alpha_decay
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Alpha Radiation is emitted when heavy, unstable nuclides, for example uranium, radium, radon and plutonium, undergo decay. The alpha particle is a helium nucleus consisting of two protons and two neutrons. It is about 8000 times heavier than an electron and has a double electric charge.
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www.kose.ee/nucbasic/nucpedia/uk/alpha_radiat.htm
www.kose.ee/nucbasic/nucpedia/uk/alpha_radiat.htm
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Alpha Rays from a Radioactive Particle in Lung Tissue ... The black star shows the tracks made over a 48 hour period by alpha rays emitted from a radioactive particle of plutonium lodged in the lung tissue of an ape (the particle itself is invisible).
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www.ccnr.org/alpha_in_lung.html
www.ccnr.org/alpha_in_lung.html
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This report provides risk estimates for various health effects of alpha radiation. ... [ In other words, it cannot be assumed that the linear hypothesis -- which is used by the authorities -- will over-state the biological damage from alpha radiation; it may in fact under-state the damage. ] ...
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www.ccnr.org/thomas_report.html
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Very large nuclei may spontaneously emit an alpha particle . The alpha particle is a He nucleus consisting of two protons and two neutrons. This type of radioactivity is not normally produced at ... However there are sources on site used mainly for calibration of instruments which do emit this type of radiation.
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www.triumf.ca/safety/rpt/rpt_2/node7.html
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Alpha radiation consists of particles with two neutrons and two protons in it. Just like the kernel of Helium. This means, that the mass of the particles is very big, compared to other nuclear particles. Therefore, alpha radiation is easily absorbed by air.
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www.bionet.schule.de/radiodata/threetypes.html
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Because alpha particles contain two protons, they have a positive charge of two. Further, alpha particles are very heavy and very energetic compared to other common types of radiation.
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www.physics.isu.edu/radinf/alpha.htm
www.physics.isu.edu/radinf/alpha.htm
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