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pp. 533-538
S&M4317 Research paper https://doi.org/10.18494/SAM6033 Published: February 6, 2026 Scintillation Properties of KCu2I3·CH3SOCH3 and RbCu2I3·CH3SOCH3 Single Crystals [PDF] Itsuki Gonda, Keishi Yamabayashi, Daisuke Nakauchi, Takumi Kato, Noriaki Kawaguchi, and Takayuki Yanagida (Received October 17, 2025; Accepted December 18, 2025) Keywords: scintillators, crystals, solution-growth method, clusters, luminescence, organic–inorganic material
KCu2I3·DMSO (K sample, DMSO: dimethyl sulfoxide) and RbCu2I3·DMSO (Rb sample) single crystals were fabricated by the solvent diffusion method. The K and Rb samples exhibited a broad emission band peaking at 550 and 530 nm, respectively, in the photoluminescence (PL) spectra. The PL quantum yield values under 450 nm excitation were 26 and 55% for the K and Rb samples, and the decay time constants were calculated to be 1.96 and 1.93 μs, respectively. These emissions were attributed to the cluster-centered charge transfer transitions. The X-ray-induced radioluminescence spectra were almost consistent with the PL spectra; thus, the emissions can be assigned to the same origin. The light yields of the K and Rb samples were estimated to be approximately 2,800 and 2,600 photons/MeV under γ-ray exposure, respectively.
Corresponding author: Itsuki Gonda![]() ![]() This work is licensed under a Creative Commons Attribution 4.0 International License. Cite this article Itsuki Gonda, Keishi Yamabayashi, Daisuke Nakauchi, Takumi Kato, Noriaki Kawaguchi, and Takayuki Yanagida, Scintillation Properties of KCu2I3·CH3SOCH3 and RbCu2I3·CH3SOCH3 Single Crystals, Sens. Mater., Vol. 38, No. 2, 2026, p. 533-538. |