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首页> 外文期刊>Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine >Thermally assisted photo transfer OSL from deep traps in Al 2O 3: C grains exhibiting different TL peak shapes
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Thermally assisted photo transfer OSL from deep traps in Al 2O 3: C grains exhibiting different TL peak shapes

机译：来自Al 2O 3中深陷阱的热辅助照片传输OSL：C晶粒显示不同的TL峰形状

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摘要

The present work studies the thermally assisted photo transfer OSL (TAPT OSL) signal in the case of Al 2O 3:C samples showing double-structured main dosimetric TL peaks. The measurement signal provides indirect experimental evidence regarding the presence of deep traps along with one transfer mechanism extremely powerful and efficient. The experimental features of this signal are presented along with those yielded for samples with narrow TL peaks for the sake of comparison. In the framework of a dosimetric characterization, the straightforward relation observed between the TAPT OSL integrated intensity and the dose, even if non-linear, implies that this signal could be effectively used towards dosimetry purposes in the high dose region up to 250Gy. Furthermore, the study on the influence of the annealing temperature on the TL glow curve shape on Al 2O 3:C grains is attempted. The variety of glow curve shapes reported especially in the case of single grains is not affected by high temperature annealing, since its effect is dominant even after heating at 1085°C. Thus, this variety should not be correlated to the different deep trap occupancies, but rather be attributed to a possible structural defect. The main dosimetric TL peak af all grains is considered to be a composite of two unambiguously different traps of non-first-order kinetics. The low temperature part of these traps, reaching a maximum at ~190°C is an electron trap and the high temperature part with maximum at ~250°C is a hole trap. TL dose response of Al 2O 3:C grains presenting double peak structures is presented for the first time in literature, suggesting the usefulness on the applicability of Al 2O 3:C in the dose regime up to 100Gy.
机译：在Al 2O 3：C样品显示双重结构的主剂量TL峰的情况下，本工作研究了热辅助照相转印OSL（TAPT OSL）信号。测量信号提供了关于深陷阱的间接实验证据，以及一种极其强大和高效的传输机制。为了比较起见，给出了该信号的实验特征以及具有窄TL峰的样品的实验特征。在剂量学表征的框架中，即使在非线性条件下，在TAPT OSL积分强度和剂量之间观察到的直接关系也意味着该信号可以有效地用于高达250Gy的高剂量区域中的剂量学用途。此外，尝试研究退火温度对Al 2O 3：C晶粒的TL辉光曲线形状的影响。报道的辉光曲线形状的变化（尤其是在单晶粒的情况下）不受高温退火的影响，因为即使在1085°C加热后，其效果仍很明显。因此，这种变化不应与不同的深层陷阱占有率相关，而应归因于可能的结构缺陷。所有晶粒的主要剂量TL峰被认为是两个非一阶动力学陷阱的明确组合。这些陷阱的低温部分在〜190°C处达到最大值是电子陷阱，而高温部分在〜250°C处达到最大值是空穴陷阱。在文献中首次提出了具有双峰结构的Al 2O 3：C晶粒的TL剂量响应，这表明Al 2O 3：C在最高100Gy的剂量方案中的适用性是有用的。

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