tritium clock

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The decay of the radioactive isotope of tritium (T), which is used to measure the age of water up to about 30 years and to monitor the movement of groundwater. The tritium is produced naturally in the upper atmosphere by the action of fast cosmic-ray neutrons on 14N and combines with hydrogen and oxygen to form HTO, which is then dispersed throughout the hydrosphere. The tritium has a half-life of 12.26 years.

Subjects: Earth Sciences and Geography — Ecology and Conservation.

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