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This is useful for ceramics, as it determines the date of firing, as well as for lava, or even sediments that were exposed to substantial sunlight.

These crystalline solids are constantly subjected to ionizing radiation from their environment, which causes some energized electrons to become trapped in defects in the molecular crystal structure.

In order to measure the supralinearity, a second analysis is carried out after removing natural TL by means of a heating (four hours at 450 °C).

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