Dalmasso C, Iacconi P, Beauvy M, Lapraz D, Balan E, Calas G
Laboratoire de Physique Electronique des Solides, Centre de Recherche sur les Solides et leurs Applications (LPES-CRESA) EA 1174, Université de Nice-Sophia Antipolis, Parc Valrose, F-06108 Nice Cedex 2, France.
Radiat Prot Dosimetry. 2006;119(1-4):222-5. doi: 10.1093/rpd/nci563. Epub 2006 Apr 27.
Alpha-alumina is a useful thermoluminescence (TL) dosemeter. The knowledge of its behaviour under irradiation is thus of primary importance. The purpose of this paper is to characterise the radiation damage produced by swift krypton ions using various experimental methods, namely TL, optical absorption, fluorescence and electron paramagnetic resonance (EPR). After ion irradiation, the TL intensity is shown to decrease, whereas the optical absorption rises in the whole studied wavelength range. These two phenomena seem to be related to one another. Furthermore, optical absorption measurements highlight the appearance of new absorption bands probably owing to oxygen vacancies. Induced defects are also observed in the EPR spectra of irradiated pellets. They are likely related to electronic holes trapped on oxygen ions. The concentration of these defects increases with ion fluence and fluorescence measurements indicate that some pre-existing defects such as F2(2+) centres follow the same trend up to approximately 4.1 x 10(13) ions cm(-2).
α-氧化铝是一种有用的热释光（TL）剂量计。因此，了解其在辐照下的行为至关重要。本文的目的是使用各种实验方法，即热释光、光吸收、荧光和电子顺磁共振（EPR），来表征快氪离子产生的辐射损伤。离子辐照后，热释光强度降低，而在整个研究的波长范围内光吸收增加。这两种现象似乎相互关联。此外，光吸收测量突出了可能由于氧空位而出现的新吸收带。在辐照颗粒的电子顺磁共振谱中也观察到了诱导缺陷。它们可能与捕获在氧离子上的电子空穴有关。这些缺陷的浓度随离子注量增加，荧光测量表明，一些预先存在的缺陷，如F2(2+)中心，在大约4.1×10(13)离子·厘米(-2)之前遵循相同的趋势。
