Osl dating australia


17-May-2019 13:34

The photons are detected using a photomultiplier tube.

The signal from the tube is then used to calculate the dose that the material had absorbed.

The OSL dosimeter provides a new degree of sensitivity by giving an accurate reading as low as 1 mrem for x-ray and gamma ray photons with energies ranging from 5 ke V to greater than 40 Me V.

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The ionizing radiation produces electron-hole pairs: Electrons are in the conduction band and holes in the valence band.For beta particles with energies from 150 ke V to in excess of 10 Me V, dose measurement ranges from 10 mrem to 1000 rem.Neutron radiation with energies of 40 ke V to greater than 35 Me V has a dose measurement range from 20 mrem to 25 rem.In diagnostic imaging the increased sensitivity of the OSL dosimeter makes it ideal for monitoring employees working in low-radiation environments and for pregnant workers.

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To carry out OSL dating, mineral grains have to be extracted from the sample.

Stimulating these mineral grains using either light (blue or green for OSL; infrared for IRSL) or heat (for TL) causes a luminescence signal to be emitted as the stored unstable electron energy is released, the intensity of which varies depending on the amount of radiation absorbed during burial and specific properties of the mineral.



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