Abstract CdWO4:Sm single crystals were studied by optical, electron-paramagnetic and thermoluminescence spectroscopy in the temperature range of 4–750 K. A hopping diffusion of self-trapped excitons and energy transfer to Sm3+ centres is demonstrated. The mechanism of energy transfer includes the formation of a Sm3+ bound exciton either by direct excitation or in the result of a thermally stimulated hopping diffusion of self-trapped excitons as well as a sequential trapping of charge carriers near the Sm3+ ions. The energy transfer from the perturbed excitons to Sm3+ ions is controlled by an electric dipole-dipole or exchange interaction and it is terminated in the temperature range of 450–650 K due to the thermal destruction of Sm3+-perturbed excitons. In the case of near-surface excitations created in the energy region of high absorption coefficients by 5-eV photons, the Sm3+ emission is additionally quenched by surface-induced quenching centres.

中文翻译：

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通过热猝灭 CdWO4:Sm 中的激子将能量转移到发光杂质

摘要 在 4-750 K 的温度范围内，通过光学、电子顺磁和热释光光谱研究了 CdWO4:Sm 单晶。证明了自陷激子的跳跃扩散和向 Sm3+ 中心的能量转移。能量转移的机制包括通过直接激发或由于自陷激子的热刺激跳跃扩散以及在 Sm3+ 离子附近连续捕获电荷载流子而形成 Sm3+ 束缚激子。从扰动激子到 Sm3+ 离子的能量转移由电偶极子-偶极子或交换相互作用控制，并且由于 Sm3+ 扰动激子的热破坏，它在 450-650 K 的温度范围内终止。