ADVANCED RESEARCH OF RADIATION-INDUCED LUMINESCENCE PHENOMENA FROM INORGANIC MATERIALS FROM VIEW POINTS OF ANALYTICAL CHEMISTRY.

从天然石英颗粒中发出的红色热释光，最初是在本实验室发现的。本文从包括光激发发光（OSL）在内的各种辐射致发光的成因和传统二维观测的发展等方面进行了探讨。除此之外，还研究了一些窑炉的发光定年和发光对古温度估计的有效性。用X射线（或γ射线）照射后的彩色中心成像（CCI）和热释光彩色成像（TLCI）对马达加斯加石晶岩制备的日本双晶片和石英z -切片进行了观察。用电子探针微量分析仪（EPMA）分析发现，这些辐射诱导的条纹图案与铝杂质分布呈明显的负相关。在这些条纹图案的基础上，从切片中获得的一些片段进行了更定量的TL和C…更多的CI光谱测量，并分析了两种杂质：Al-和oh -杂质的浓度。分别用中子活化分析和红外光谱法对其进行了分析。辐射诱导现象与Al-和OH-（可能是由于悬空键）杂质浓度呈负相关，而esr光谱中的Al中心与辐射诱导现象呈正相关，这是众所周知的。根据这些实验结果，我们提出了一个模型，在这个模型中，OH杂质作为辐射分解产物形成的H^0原子将能够作为辐射诱导现象的杀手。该模型与以下结果一致：在液氮中辐照和后续测量的ESR光谱中检测到H^0自由基和强烈的al中心的存在，而在加热一次至室温后再冷却样品的ESR测量中证实了al中心信号的消除和H^0中心的完全消失。有趣的是，经过退火处理后，辐射诱导现象较少的部分从原来的蓝色tl变成了强烈的红色tl位点，这可能是由于排除了OH杂质作为水蒸气。少

Red thermoluminscence from natural quartz grains, which has been initially found in the present laboratory., has been searched from aspects of causes as well as development of conventional 2-dimensional observation for a variety of radiation-induced luminescence, including optically stimulated luminescence (OSL). In addition to these, the luminescence dating and the availability of luminescence onto paleotemperature estimation of some kilns have been studied.Japanese twin slices and quartz Z-cut ones, which were prepared from a madagascar crystal rock, were observed with color center images (CCI) and thermoluminescence color imaging (TLCI) after X (or gamma) -ray irradiation. It was found that these striped radiation-induced patterns offered an apparently inverse correlation with Al-impurity distribution from an electron probe micro-analyzer (EPMA). On the basis of these striped patterns, some segments obtained from the slice were subjected to more quantitative measurements of TL and C … More CI spectometry, together with the analysis of the concentrations of two kinds of impurity : Al- and OH-impurities. These were analyzed by means of neutron activation analysis and infra-red spectroscopy, respectively. A reverse-correlation was found between the radiation-induced phenomena and the Al- and OH- (probably due to dangling bonds) impurity concentrations, whereas Al-centers from ESR-specta give a positive correlation with radiation-induced phenomena, as is well known. From these experimental results, a model has been proposed in which the H^0-atoms, formed as a radiolysis product from OH impurities, will be able to operate as killers of radiation-induced phenomena.This model was in consistent with the following results ; the existence of H^0 radicals and intense Al-centers were detected in ESR spectra after the irradiation and subsequent measurements at liquid N_2, whereas the elimination of the Al-center signal, associated with the complete disappearance of the H^0 centers, was confirmed from ESR-measurements on re-cooled samples, after warming once to room temperature. The parts possessing less radiation-induced phenomena were interestingly changed into intense red-TL sites from original blue-TL ones after the annealing treatment, presumably owing to the exclusion of OH impurities as water vapor. Less