The 18th International Theophilus Symposium (IFAC-2022) on Spectroscopy of Crystals Activated by Ions of Rare Earths and Transition Metals (August 22-26, 2022, Moscow)
Optical materials

Spectroscopy of divalent samarium in caesium iodide single crystals

D. O. Sofich, R. Yu. Shendrik

Vinogradov Institute of Geochemistry and Analytical Chemistry, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russia

Abstract: The article describes the process and parameters of growing CsI : Sm$^{2+}$ single crystals by the Czochralski method. Spectroscopic studies of the CsI : Sm$^{2+}$ single crystal have been carried out; it has been established that samarium ions enter the caesium iodide single crystal in the divalent state. At room temperature, luminescence is observed corresponding to the $4f^5d^1$—$4f^6$ transitions of divalent samarium; on cooling, only radiative $4f^6$–$4f^6$ transitions are observed. The temperature dependence of the luminescence has been measured, the barrier energy has been determined, and the decay times of the luminescence have been measured.

Keywords: luminescence, halides, samarium, scintillators, single crystals.

Received: 28.10.2022
Revised: 24.12.2022
Accepted: 21.03.2023

DOI: 10.21883/OS.2023.05.55712.59-22

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