The well-known thermoluminescent material LiF:Mg,Cu,P (MCP) was previously shown to emit significant optically stimulated luminescence (OSL). In this paper, we investigate the rate of OSL recombination processes in MCP, expressed as effective lifetimes, using time-correlated single photon counting, in this context often referred to as time-resolved pulsed OSL. The recombination luminescence fell into two categories: (i) a dominant fast decaying luminescence described by the two lifetimes ${\tau }_1=22.8\left(1.7\right)\mathrm{\mu s}$ and ${\tau }_2=60\left(5\right)\mathrm{\mu s}$ and (ii) a slowly decaying part with indeterminate decay profile at a comparatively low signal level (we denote this as “offset luminescence”). The fast recombination channels corresponding to ${\tau }_1$ and ${\tau }_2$ are responsible for $71\text{\%}$ of the total luminescence observed during test measurements. The luminescence associated with ${\tau }_1$ dominate the beginning of an experiment, but is depleted much quicker than the luminescence associated with ${\tau }_2$. We show that all recombination channels show similar response to preheating of the sample, which suggests that they are associated with the same trapping centers.

先前已显示众所周知的热致发光材料LiF：Mg，Cu，P（MCP）会发出明显的光学激发发光（OSL）。在本文中，我们使用时间相关的单光子计数来研究MCP中OSL重组过程的速率，将其表示为有效寿命，在这种情况下，通常将其称为时间分辨脉冲OSL。重组发光分为两类：（i）由两个寿命描述的主要快速衰变发光${\tau }_{\mathrm{1个}}=22.8（1.7）\mathrm{微秒}$ 和 ${\tau }_2=60（5）\mathrm{微秒}$（ii）在相对较低的信号电平下具有不确定衰减曲线的缓慢衰减部分（我们将其称为“偏移发光”）。对应的快速重组通道${\tau }_{\mathrm{1个}}$ 和 ${\tau }_2$ 负责 $71\text{％}$在测试测量中观察到的总发光量。与发光有关${\tau }_{\mathrm{1个}}$ 在实验开始时占主导地位，但比与之相关的发光快得多 ${\tau }_2$。我们显示，所有重组通道对样品的预热均显示相似的响应，这表明它们与相同的捕集中心相关。