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首页> 外文期刊>Physica status solidi, B. Basic research >Decay kinetics of the luminescence of Ag~- centers doped in alkali halide crystals
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Decay kinetics of the luminescence of Ag~- centers doped in alkali halide crystals

机译：碱金属卤化物晶体中掺杂的Ag〜-中心发光的衰减动力学

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摘要

Decay kinetics of the luminescence of Ag centers doped in NaC1, KBr, and CsBr single crystals have been investigated in the temperature range from 4 K to 260 K. At low tempera_ture, the radiative transitions from the ~1T_(1u) states in the Ag centers exhibit the luminescence with the decay time constants of about 1.3 ns. With increasing temperature, the decay time constants decrease, reflecting a thermally acti_vated non-radiative transition process from the ~1T_(1u) to ~3T_(1u) states. On the other hand, the luminescence due to the radiative transitions from the ~3T_(1u) states have the decay time constants of about 1.0 ms at low temperature and about 10 _s above 80 K. From the analysis of the temperature dependence of the decay time constants, the parameters of a three-level model and a thermally activated non-radiative process from the ~1T_(1u) to ~3T_(1u) states are obtained. The parameters are discussed as compared with those of other Tl~+-type centers doped in alkali halide crystals.
机译：在4 K至260 K的温度范围内，研究了NaC1，KBr和CsBr单晶中掺杂的Ag中心发光的衰变动力学。在低温下，Ag中〜1T_（1u）态的辐射跃迁中心显示发光，衰减时间常数约为1.3 ns。随着温度升高，衰减时间常数减小，反映了从〜1T_（1u）态到〜3T_（1u）态的热活化非辐射跃迁过程。另一方面，由于从〜3T_（1u）态的辐射跃迁引起的发光在低温下具有约1.0 ms的衰减时间常数，在80 K以上时具有约10 s的衰减时间。通过对衰减的温度依赖性的分析获得时间常数，三级模型的参数以及从〜1T_（1u）到〜3T_（1u）状态的热激活非辐射过程。讨论了该参数与碱金属卤化物晶体中掺杂的其他Tl〜+型中心的参数。

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