Kalita J M, Chithambo M L
Department of Physics and Electronics, Rhodes University, P O Box 94, Grahamstown 6140, South Africa.
Appl Radiat Isot. 2018 Oct;140:69-75. doi: 10.1016/j.apradiso.2018.06.012. Epub 2018 Jun 15.
We report the effect of pre-dose on the thermoluminescence (TL) and optically stimulated luminescence (OSL) dose response of α-AlO:C,Mg and α-AlO:C. Before any luminescence measurement, the samples were irradiated with different doses, namely 100, 500 and 1000 Gy to populate the deep electron traps. This is the pre-dose. The results from TL and OSL studies are compared with results from samples used without any pre-measurement dose. The TL glow curves and OSL decay curves of α-AlO:C,Mg recorded after pre-doses of 100, 500 and 1000 Gy are identical to those from a sample used without any pre-dose. Further, the TL and OSL dose response of all α-AlO:C,Mg samples are similar regardless of pre-dose. In comparison, the TL glow curves and OSL decay curves of α-AlO:C are influenced by pre-dose. We conclude that the differences in the TL and OSL dose response of various pre-dosed samples of α-AlO:C are due to the concentration of charge in the deep traps. On the other hand, owing to the lower concentration of such deep traps in α-AlO:C,Mg, the TL or OSL dose responses are not affected by pre-dose in this material.
我们报告了预剂量对α-AlO:C,Mg和α-AlO:C热释光（TL）及光激发发光（OSL）剂量响应的影响。在进行任何发光测量之前，用不同剂量（即100、500和1000 Gy）对样品进行辐照，以填充深电子陷阱。这就是预剂量。将TL和OSL研究的结果与未进行任何预测量剂量的样品的结果进行比较。在100、500和1000 Gy预剂量后记录的α-AlO:C,Mg的TL发光曲线和OSL衰减曲线与未进行任何预剂量的样品的曲线相同。此外，无论预剂量如何，所有α-AlO:C,Mg样品的TL和OSL剂量响应都相似。相比之下，α-AlO:C的TL发光曲线和OSL衰减曲线受预剂量影响。我们得出结论，α-AlO:C不同预剂量样品的TL和OSL剂量响应差异是由于深陷阱中的电荷浓度所致。另一方面，由于α-AlO:C,Mg中此类深陷阱的浓度较低，该材料的TL或OSL剂量响应不受预剂量影响。
