Bernal R, Souza D N, Valerio M E G, Cruz-Vázquez C, Barboza-Flores M
Centro de Investigación en Física, Universidad de Sonora, Apdo. Postal 5-088 Hermosillo, Sonora, México.
Radiat Prot Dosimetry. 2006;119(1-4):161-3. doi: 10.1093/rpd/nci677. Epub 2006 May 30.
Optically stimulated luminescence (OSL) has become the technique of choice in many areas of dosimetry. Natural materials like topaz are available in large quantities in Brazil and other countries. They have been studied to investigate the possibility of use its thermoluminescence (TL) properties for dosimetric applications. In this work, we investigate the possibility of utilising the OSL properties of natural Brazilian topaz in dosimetry. Bulk topaz samples were exposed to doses up to 100 Gy of beta radiation and the integrated OSL as a function of the dose showed linear behaviour. The fading occurs in the first 20 min after irradiation but it is <6% of the integrated OSL measured shortly after exposure. We conclude that natural colourless topaz is a very suitable phosphor for OSL dosimetry.
光激发发光（OSL）已成为剂量测定许多领域的首选技术。巴西和其他国家有大量如黄玉等天然材料。人们对它们进行了研究，以探讨利用其热释光（TL）特性用于剂量测定应用的可能性。在这项工作中，我们研究了利用巴西天然黄玉的OSL特性进行剂量测定的可能性。块状黄玉样品受到高达100 Gy的β辐射剂量照射，积分OSL随剂量的变化呈线性行为。辐照后最初20分钟内会发生衰减，但衰减量小于照射后不久测得的积分OSL的6%。我们得出结论，天然无色黄玉是一种非常适合用于OSL剂量测定的磷光体。
