Luminescence dating definition

An input of energy, such as heat, is required to free these trapped electrons.The accumulation of trapped electrons, and the gaps left behind in the spaces they vacated, occurs at a measurable rate proportional to the radiation received from a specimen’s immediate environment.Thermoluminescence (TL) is the process in which a mineral emits light while it is being heated: it is a stimulated emission process occurring when the thermally excited emission of light follows the previous absorption of energy from radiation.Energy absorbed from ionising radiation (alpha, beta, gamma, cosmic rays) frees electrons to move through the crystal lattice and some are trapped at imperfections in the lattice.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.By continuing to use this site, you consent to the use of cookies.

The wavelength of the emitted light is characteristic of the luminescent substance and not of the incident radiation.The excitation sources are ultraviolet radiation and electrons, respectively.Other types are ionoluminescence, chemiluminescence and others. Bio luminescence is light emitted by living organisms.Karl Karlovich Rebane has written: 'Hot luminescence and relaxation processes in the centres of luminescence' -- subject(s): Luminescence, Relaxation (Nuclear physics) 'Energia, entroopia, elukeskkond' -- subject(s): Entropy, Environmental protection, Power resources A substance that increases the effectiveness of a rubber vulcanization accelerator; for example, zinc oxide or litharge.A trace quantity of a substance that imparts luminescence to crystals; for example, silver or copper in zinc sulfide or cadmium sulfide pigments. Chen has written: 'Thermally and optically stimulated luminescence' -- subject(s): Optically stimulated luminescence dating, Thermoluminescence, Thermoluminescence dosimetry, SCIENCE / Molecular Physics Arnol'd Sergeevich Marfunin has written: 'Spectroscopy, luminescence and radiation centers in minerals' -- subject(s): Color centers, Determinative Mineralogy, Holes (Electron deficiencies), Luminescence, Spectrum analysis The two main types of mineral luminescence are photoluminescence and cathodoluminescence.

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