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| a positively charged particle emitted from certain radioactive nuclei; it consists of two protons and two neutrons ans is identical to the nucleus of a helium atom. |
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| the region on a neutron vs. proton plot where stable nuclei are found. |
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| an electron that is emitted from the nucleus of an atom when a neutron breaks apart. |
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| a radiation detection device worn by workers routinely exposed to radiation; the device consists of several layers of photographic encased in a plastic or metal holder. |
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| the splitting of a nucleus into smaller fragments, accompanied by the release of neutrons and a large amount of energy. |
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| the process of combining nuclei to produce a nuclei of greater mass. |
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| a high-energy photon emitted by a radioisotope. |
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| a device that uses a gas-filled metal tube to detect radiation. |
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Definition
| the time required for one-half of the nuclei of a radioisotope sample to decay into products. |
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| radiation with enough energy to remove electrons off some of the atoms of a bombarded substance to produce ions. |
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| a process that decreases the number of slow-moving neutrons in a nuclear reactor; this is accomplished by using control rods made of a material such as cadmium. |
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| neutron activation analysis |
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Definition
| a proceducre used to detect trace amounts of elements in samples by bombarding the sample with neutrons from a radioactive source. |
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| a process used in nuclear reactors to slow down neutrons so the reactor fuel captures them to continue the chain reaction. |
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| a particle with the mass of an electron, but with a positive charge. |
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| the penetrating rays and particles emitted by a radioactive source. |
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| the process by which nucle emit particles and rays. |
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Definition
| isotopes that have unstable nuclei and undergo radioactive decay |
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Definition
| a device that uses a phosphor-coated surface to detect radiation. |
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Definition
| the conversion of an atom of one element to an atom of another element. |
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| any of the elements on the periodic table with an atomic number above 92. |
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