Nuclide dating

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Ordinary electric current is the flow of electrons through a wire conductor (see electricity).The electron is one of the basic constituents of matter......The thorium-234 produced above experiences two successive beta decays: Gamma rays have very great penetrating power and are not affected at all by a magnetic field.They move at the speed of light and have a very short wavelength (or high frequency); thus they are a type of electromagnetic radiation (see gamma radiationgamma radiation,high-energy photons emitted as one of the three types of radiation resulting from natural radioactivity.

For example, in the disintegration, or decay, of uranium-238 by the emission of alpha particles, radioactive thorium (formerly called ionium) is produced.

radiation sickness,harmful effect produced on body tissues by exposure to radioactive substances.

The biological action of radiation is not fully understood, but it is believed that a disturbance in cellular activity results from the chemical changes caused by ionization (see.....

particle accelerator,apparatus used in nuclear physics to produce beams of energetic charged particles and to direct them against various targets.

Such machines, popularly called atom smashers, are needed to observe objects as small as the atomic nucleus in studies of its..... Essentially there is no difference between these two manifestations of radioactivity.

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