Energy Transfer in the CaSO4-Dy Thermoluminescent Dosimeter from the Excited State of the SO2-4 Anionic Complex to the Impurities
Nurakhmetov T.N. Alibay T.T. Zhangylyssov K.B. Daurenbekov D.H. Salikhodzha Z.M. Shamiyeva R.K. Sadykova B.M. Yussupbekova B.N. Tolekov D.A.
November 2023Multidisciplinary Digital Publishing Institute (MDPI)
Crystals
2023#13Issue 11
The creation of a combined radiative state at 2.95–3.1 eV in the phosphor (Formula presented.) has been investigated using vacuum ultraviolet and thermoactivation spectroscopy methods. It is shown that the combined radiative electronic state is formed from the radiative electronic states of the impurity electronic trapping centers (Formula presented.) and the intrinsic electronic radiative states (Formula presented.) during the excitation of the anion complex (Formula presented.), as a result of charge transfer from the excited anion complex (Formula presented.) to the impurities and the neighboring anion complex (Formula presented.). In the (Formula presented.) phosphor, the combined radiative electronic state and impurity emission of (Formula presented.), 2.16 eV and 2.56 eV are excited by photons with energies of 3.95–4.0 eV and 4.5–4.6 eV. Energy transfer from the matrix to the (Formula presented.) impurities is revealed upon thermal exposure as a result of the ionization of the electronic capture centers of (Formula presented.) and (Formula presented.).
dosimeter , electron , electronic state , hole , recombination emission , spectroscopy
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Faculty of Physics and Technology, L.N. Gumilyov Eurasian National University, 2 Satpayev Str., Astana, 010008, Kazakhstan
Faculty of Physics and Technology
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