Thermoluminescence (TL)
Вставка
- Опубліковано 16 вер 2024
- [THE PAST UNDER THE MICROSCOPE, 25. 7. 2017 - 30. 4. 2018]
Analyses: Žiga Šmit
Video: Cita Turk
© Narodni muzej Slovenije, 2017
Thermoluminescence is a method for dating some types of ceramic, glass, burnt flint, and clay; however, it requires the destruction of a relatively significant amount of sample material. Energy is accumulated in the objects due to the natural radioactive radiation. When a sample is heated in a few seconds to 400 °C, the accumulated energy is released in the form of light and can be measured. We can only date objects that exposed to strong heating in the past when all energy was released from them and they started to accumulate it again. By measuring the emitted energy, we determine how long has passed since the material was last exposed to high temperatures, for example in the kiln.
Anthropology optional na?
this is really cool
Nice
Dober dan. What temperature was the stove on? Low middle or high heat. Thanks a lot
Hi,
the stove was on high heat.
Best regards,
NMS team
What is the unit of measurement that is used to determine the amount of light emitted that is proportional to the years? How much light equals one year?
Hi, sorry for the late reply. Prof. Žiga Šmit from the Faculty of Mathematics and Physics, University of Ljubljana, prepared an answer: "The emitted light is measured as the number of collected photons or the collected charge from the photomultiplier. It is proportional to the absorbed radiation dose, which in turn is proportional to the exposure time (i.e. age). The proportional constant is determined experimentally, by measuring light from the sample exposed to a known radiation dose in the laboratory. At the site, it is further necessary to measure the dose rate of natural radiation."
Cool
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