Proposal of a new analytical method for rare earth elements and a provenance search for geological materials using thermo-luminescence phenomena

从热释光的基本发射特性出发，利用一些仪器测量方法对热释光现象进行了研究。首先，利用传统的摄影系统和高灵敏度的彩色胶片，开发了TL彩色图像（简称TLCI）摄影技术。在观察各种天然石英的tlci时，一个值得注意的发现是两种不同的颜色图像，它们很容易区分为红色和蓝色的tl发射颗粒。其次，利用与个人计算机和陶瓷加热器相连的光子计数装置进行了更定量的tl分析。结果表明，原岩中β -石英的TLCI为红色，而原岩中α -石英（伟晶岩成因和花岗岩地层）的TLCI为典型的蓝色。化学分析表明，红色释tl石英的稀土元素含量高于蓝色释tl石英。红色TL组也被证实比常用的蓝色TL组更适合TL年表。第三，研制了用于TL等极弱光在线多光谱分析的光子多通道分析仪（PMA），采用溶胶-凝胶法将从蓝色和红色TL石英中提取的杂质元素掺杂到合成石英玻璃中。人工辐照后对合成玻璃进行PMA分析。值得注意的是，这两种合成玻璃出人意料地给出了几乎相似的光谱变化，包括三个峰在较长的波长区域，而不是天然的蓝色和红色tl石英各自具有单个宽峰。

Thermoluminescence (TL) phenomena were investigated from viewpoints of the fundamental emission properties using some deviced measuring methods. Firstly, a TL color image (abbreviated to TLCI here) photography was developed by using a conventional photographing system and a highly sensitive color film. When the TLCIs of various natural quartzes were observed, a noticeable finding was of two different color images, which were readily distinguishable as red and blue TL-emitting grains. Secondly, more quantitative TL-analyses were carried out by means of photon-counting apparatus connected with a personal computer and a ceramic heater. It was revealed that the beta-quartzes in the original always indicate a red TLCI, whereas alpha-quartzes in the original (pegmatite origin and granite strata) give a typical blue TLCI. From chemical analyses, it was found that the red TL-emitting quartz had higher contents of rare earth elements (REEs) than blue group. The red TL groups are also verified to be preferable for the TL-chronology instead of blue ones, which have been commonly utilized. Thirdly, a photonic multichannel analyzer (PMA) was developed for the online multi-spectrometry of extremely weak light like TL. Some impuritiy elements, extracted from both blue and red TL quartzes, were doped to synthetic quartz glasses using a sol-gel method. These synthetic glasses were subjected to the PMA analysis after the artificial irradiation. It was noteworthy that both synthetic glasses unexpectedly gave almost similar spectrum changes consisting of three peaks at longer wavelength regions contrary to the natural blue and red TL-quartzes possessing respective single broad peak.