The main drawback of LiMgPO is high fading. In order to improve the time stability of the optically stimulated luminescence (OSL) signal of LiMgPO after irradiation, five preparation processes had been adopted to prepare five kinds of LiMgPO:Er phosphor. The structure of the prepared samples was analyzed by X-ray diffraction. The OSL decay curves, thermoluminescence (TL) glow curves, OSL sensitivity, minimum detectable dose (MDD) and the fading properties after irradiation for the five kinds of LiMgPO:Er phosphors were investigated. Considering minimizing fading 24 h after irradiation, the preparation process for samples heated at 900 °C for 10 h is optimal. The OSL fading of LiMgPO phosphor is improved significantly by changing the preparation processes. The less than 5% loss of the OSL signal was measured after 24 h of the irradiation for samples heated at 900 °C for 10 h when the integration time is more than 0.5 s, and the sensitivity by taking the total area under the OSL curve of this samples is about half that of TLD-500k. There is a loss of less than or equal to 5% of the OSL signal for samples heated at 900 °C for 10 h when the integration time is greater than or equal to 20 s within 30 days after irradiation. LiMgPO:Er samples heated at 900 °C for 10 h is the LiMgPO phosphor with the lowest fading so far. It is possible to prepare a LiMgPO phosphor with a low fading after irradiation and a moderate sensitivity by further investigating the preparation processes.

中文翻译：

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LiMgPO4:Er 光激发光的短期衰落研究

LiMgPO 的主要缺点是高褪色。为了提高LiMgPO4在辐照后光受激发光(OSL)信号的时间稳定性，采用5种制备工艺制备了5种LiMgPO:Er荧光粉。通过X射线衍射分析了制备的样品的结构。研究了五种LiMgPO:Er荧光粉的光释光衰减曲线、热释光（TL）辉光曲线、光释光灵敏度、最小可检测剂量（MDD）以及辐照后的褪色特性。考虑到最大限度地减少辐照后24小时的褪色，在900℃下加热10小时的样品制备工艺是最佳的。通过改变制备工艺，LiMgPO荧光粉的OSL褪色得到显着改善。当积分时间大于0.5秒时，在900°C加热10小时的样品照射24小时后测量到OSL信号损失小于5%，并通过取OSL曲线下的总面积来确定灵敏度该样本的数量约为 TLD-500k 的一半。辐照后 30 天内，当积分时间大于或等于 20 秒时，在 900 °C 下加热 10 小时的样品，OSL 信号损失小于或等于 5%。 LiMgPO:Er样品在900°C下加热10小时是迄今为止褪色最低的LiMgPO荧光粉。通过进一步研究制备工艺，有可能制备出辐照后褪色低、灵敏度适中的LiMgPO荧光粉。