Abstract The luminescent and dosimetric properties of nanostructured aluminum oxide which contains a mixture of metastable transition Θ, δ, and κ-phases were investigated. To vary the phase composition of the samples, they were annealed in air at 850–1200 оС. It was found that annealing the samples at Т = 850–1100 оС in air results in a change in the percentages of κ- and δ-phases with a slight variation in the Θ-phase concentration. Alpha-phase begins to form in the samples at Т = 1100 оС, its concentration reaches 100% at Т = 1200 оС. The PCL spectra featured bands associated with F- and F2-type centers, the intensity of which decreased with increasing annealing temperature due to thermal destruction of centers. Kinetic TL parameters of the samples irradiated with a pulsed electron beam (130 keV) were found by deconvoluting TL curves into elementary peaks of general order kinetics. These parameters change insignificantly when the annealing temperature increases up to 1000 оС and they change greatly when the temperature grows further and α-phase is formed in the samples. The presence of sublinear sections of the TL dose response at doses of 1.5–45 kGy shows that the use of nanostructured aluminum oxide which contains transition phases for high-dose TL dosimetry of pulsed electron beams is promising.

中文翻译：

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纳米结构氧化铝过渡相的发光和剂量学特性

摘要 研究了含有亚稳态跃迁 Θ、δ 和 κ 相混合物的纳米结构氧化铝的发光和剂量学特性。为了改变样品的相组成，它们在空气中以 850–1200 оС 进行退火。发现在 Т = 850–1100 оС 下在空气中对样品进行退火会导致 κ 和 δ 相百分比发生变化，而 Θ 相浓度略有变化。α 相在 Т = 1100 оС 开始在样品中形成，其浓度在 Т = 1200 оС 时达到 100%。PCL 光谱的特点是与 F 型和 F2 型中心相关的带，由于中心的热破坏，其强度随着退火温度的升高而降低。用脉冲电子束 (130 keV) 照射的样品的动力学 TL 参数是通过将 TL 曲线解卷积为一般有序动力学的基本峰来发现的。当退火温度升高到 1000 ?С 时，这些参数变化不明显，而当温度进一步升高并在样品中形成 α 相时，这些参数变化很大。1.5-45 kGy 剂量下 TL 剂量响应的亚线性部分的存在表明，使用包含过渡相的纳米结构氧化铝用于脉冲电子束的高剂量 TL 剂量测定是有前途的。