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- W2491430900 abstract "This chapter discusses the nature of isotopes and radiation. Isotopes are slightly different forms of the same element, having the same chemical properties and characteristics, but each isotope has a slightly different atomic weight or mass number. It is this vital difference that enables one to make such good use of them, as a naturally occurring element either exists in the one isotope form, or if it exists in more than one form, one knows the characteristic properties. Radioisotopes are unstable, that is, they undergo spontaneous disintegration and give off atomic particles, as a stream of radiation, which can be of different types. The emission of atomic particles can be visualized as flashes of invisible light. In radioisotope experiments, the absolute amount of radioactivity is seldom required and is, therefore, not measured, but comparative activity is recorded as pulses or counts per minute or as counts per second. The counts from the unknown sample are then referred back to a standard of known composition and count rate. A radioisotope is most often accompanied by stable isotope, either in the initial preparation that is used for the experiment or when it is subsequently incorporated into biological material." @default.
- W2491430900 created "2016-08-23" @default.
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- W2491430900 date "1980-01-01" @default.
- W2491430900 modified "2023-09-26" @default.
- W2491430900 title "The Nature of Isotopes and Radiation" @default.
- W2491430900 doi "https://doi.org/10.1016/b978-0-08-024924-7.50008-9" @default.
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