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Posted by / 21-Jan-2019 13:13

Isotope dating techniques

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.

The Nature of the Nucleus Composition Atomic nuclei are composed of two types of particles, protons and neutrons, which are collectively known as nucleons......Ordinary electric current is the flow of electrons through a wire conductor (see electricity).The electron is one of the basic constituents of matter......Other, less common, types of radioactivity are electron capture (capture of one of the orbiting atomic electrons by the unstable nucleus) and positron emission—both forms of beta decay and both resulting in the change of a proton to a neutron within the nucleus—an internal conversion, in which an excited nucleus transfers energy directly to one of the atom's orbiting electrons and ejects it from the atom.Alpha rays have the least penetrating power, move at a slower velocity than the other types, and are deflected slightly by a magnetic field in a direction that indicates a positive charge.

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Thus, the net effect of alpha radioactivity is to produce nuclei lighter than those of the original radioactive substance.

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