Uses of radiation in radio dating creative dating headline
A source kept in school will not cause its lead case to become radioactive, as the nuclei of the lead atoms will not be changed by the absorption of the radiation.
Four main uses of radioactive particles are detailed here: tracers, medical treatment, archaeological dating and scattering experiments.
Smoke alarms contain a weak source made of Americium-241.
Alpha particles are emitted from here, which ionise the air, so that the air conducts electricity and a small current flows.
Such radioisotopes as cobalt-60 and cesium-137 are widely used to treat cancer.
As radioisotopes are identical chemically with stable isotopes of the same element, they can take the place of the latter in physiological processes.
Moreover, because of their radioactivity, they can be readily traced even in minute quantities with such detection devices as gamma-ray spectrometers and proportional counters.
Animals and plants have a known proportion of Carbon-14 (a radioisotope of Carbon) in their tissues.
When they die they stop taking Carbon in, then the amount of Carbon-14 goes down at a known rate (Carbon-14 has a half-life of 5700 years).
Using such techniques, investigators have been able to determine the ages of various rocks and rock formations and thereby quantify the , has proved especially useful to physical anthropologists and archaeologists.