Comparison and further improvement of some luminescence dating methods using heating and light-illuminating excitation

采用单等分再生剂量(SAR)法实现了可靠的热释光(TL)和光刺激发光(OSL)测年，从对少量样品等分的要求来看，优于多等分添加剂量(MAAD)方法。在合成孔径雷达测量中，利用人工辐射源在固定几何条件下进行多次发光测量和人工剂量测量。由于日本对放射性同位素(RI)源(40~50mci)存在严重限制，本实验室的自动发光测量装置配备了小型或微型X射线发生器，从而建立了这样的实验条件。这种新型的自动发光测量系统不仅适用于BTL和OSL，而且还适用于采用合成孔径雷达方法的RTL。该系统的特点是由一组陶瓷加热器和一个玻璃芯棒作为有效的发光检测装置。Practia…利用自动发光测量系统，对3,500-6,000年前使用过的9件绳纹陶片中的Lly、石英和长石提取物进行了RTL、BTL、OSL和IRSL(红外受激发光)四种发光测量。根据这些结果，用累积剂量和年剂量计算的RTL-AGE与其他OSL-AGE和IRSL-AGE进行了比较。总之，RTL测年被确认为最可靠的测年方法，当可以从燃烧的考古材料中提取石英时。最近，类似的RTL测年方法被令人满意地应用于较年轻的烧制考古材料，如屋顶瓦片(Sairyuji寺庙)和古代窑石(崎玉和北海道)。从液氮温度到0℃的低温区热释光发光曲线的基本性质研究，结合电子自旋共振光谱，探讨了一种改进的发光测年方法。结果表明，石英样品中的Al和OH杂质与热退火温度和冷却速度一起对热释光性能有显著的影响。较少

The reliable TL (thermoluminescence) and OSL (optically stimulated luminescence)-dating methods are realized using a single aliquot regenerative dose (SAR) method which is superior to a multiple aliquots additive dose (MAAD) method from aspect of requirement of a few of sample aliquots. In the SAR measurement, several repetitions of the luminescence measurements and artificial dosing under a fixed geometrical condition by an artificial radiation source. Such experimental conditions have been established by an automated luminescence measuring apparatus equipped with a small or a mini X-ray generator in our laboratory, because a serious limitation exists in Japan for a radioactive isotope (RI) source (amounting to 40〜50 mCi). The new automated luminescence measuring system which is applicable not only to BTL and OSL but also to RTL using the SAR method. The features of this system contain a cluster of ceramics heaters, and a glass core-rod as an effective luminescence detection. Practica … More lly, quartz and feldspar extracts, from nine Jomon pottery pieces, which were assumed to be used 3,500-6,000 years ago, were followed to four kinds of luminescence measurements, involving RTL, BTL, OSL, and IRSL (infrared stimulated luminescence), using the automated luminescence measuring system. On these results, the RTL-ages, calculated using the accumulated doses and annual doses were compared with other OSL-and IRSL-ages. Conclusively, the RTL-dating was confirmed to be most reliable dating-method when quartz extracts from burnt archaeological materials are available. Recently, the similar RTL dating was satisfactorily applied for younger burnt archaeological materials such as the roof tile pieces (Sairyuuji temple) and stones of ancient kiln (Saitama and Hokkaido). An advanced luminescence dating was approached from basic property search of TL-glowcurve in lower temperature region from liquid nitrogen temperature up to 0 ℃, combined with electron spin resonance (ESR) spectrometry. As a result, Al and OH impurities in quartz specimens were found to affect remarkably the TL-properties together with thermal annealing temperature and cooling rate. Less