Thermoluminescence and radioluminescence of α-Al2O3:C,Mg at high temperatures

Thermoluminescence and radioluminescence of α-Al2O3:C,Mg at high temperatures
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α-Al2O3:C,Mg 在高温下的热释光和放射发光

DOI:
10.1016/j.jlumin.2018.08.018
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发表时间:
2018
影响因子:
3.6
通讯作者:
Jacobsohn, Luiz Gustavo
Jacobsohn, Luiz Gustavo
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Trindade, Neilo Marcos;Jacobsohn, Luiz Gustavo

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采用光吸收和光致发光的方法对α-Al2O3:C,Mg单晶进行了研究,目的是找出发光过程中存在的缺陷。在1.7-5.0 eV范围内,通过热释光(TL)测量研究了光谱发射的函数。x射线激发下的辐射发光测量作为温度的函数,从室温到400 °C进行。这些测量揭示了F、F型、F聚集体和mg扰动F型和F聚集体中心的存在,以及它们的热猝灭行为。进一步揭示了这些缺陷在TL过程中作为重组中心的作用。
A α-Al2O3:C,Mg single crystal was investigated by means of optical absorption and photoluminescence measurements aimed at the identification of defects involved in the luminescence process. It was also investigated by thermoluminescence (TL) measurements as a function of the spectral emission in the 1.7–5.0 eV range. Radioluminescence measurements under X-ray excitation as a function of the temperature, from room temperature up to 400 °C were executed. These measurements revealed the presence of F, F-type, F-aggregate, and Mg-perturbed F-type and F-aggregate centers, and their thermal quenching behavior. Further, the role of these defects as recombination centers in the TL process was revealed.
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