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Time-resolved high energy ionoluminescence of Al2O3
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms ( IF 1.3 ) Pub Date : 2021-05-25 , DOI: 10.1016/j.nimb.2021.05.010
A. Seitbayev , V.A. Skuratov , A. Dauletbekova , Yu.G. Teterev , A.N. Krylov , M. Mamatova , M. Koloberdin , M. Zdorovets

We have compared the luminescence decay from intact and pre-damaged Al2O3 crystals registered during single swift heavy ion and photo- picosecond laser pulse excitation (λex. = 440 nm). The decay curves measured during 1.2 ÷ 1.6 MeV/amu C, Ar, V, Kr, Xe ion irradiation at room temperature are composed of three components – fast (τ1 < 1 ns), τ2 = 1.8 ns (F+-centers) and τ3 = 54–80 ns (E-luminescence, the nature of emission is under discussion). The measurements performed on pre-irradiated samples have demonstrated that accumulated radiation damage suppresses the E-luminescence and only τ1 and τ2 components are observed.

It was found that photoexcitation at 440 nm induces strong emission of F22+- centers with a lifetime of about 8 ns which is not detected during high energy ion irradiation. This is ascribed to the quenching effect of high density excitations in a particle track.



中文翻译:

Al 2 O 3的时间分辨高能电致发光

我们已经比较了在单个快速重离子和皮秒皮秒激光脉冲激发(λex。= 440 nm)期间记录的完整和预先损坏的Al 2 O 3晶体的发光衰减。快速(τ -衰减曲线中1.2÷1.6兆电子伏/ amu的C,氩,V,氪,在室温下的Xe离子照射由三种组分的测量1  <1纳秒),τ 2  = 1.8纳秒(F + -centers )和τ 3  = 54-80纳秒(E-发光,发射的性质是下的讨论)。该测量在预辐照样品进行已经证明,积聚辐射损伤抑制E-发光和仅τ 1和τ 2 组件被观察到。

发现在440nm处的光激发诱导了F 2 2 + -中心的强发射,其寿命为约8ns,这在高能离子辐照期间没有被检测到。这归因于粒子轨道中高密度激发的猝灭作用。

更新日期:2021-05-26
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