Thermoluminescence of Sodium Sulfate and Lead Sulfate and Miscellaneous Sulfates, Carbonates and Oxides
Thermoluminescence of Sodium Sulfate and Lead Sulfate and Miscellaneous Sulfates, Carbonates and Oxides
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硫酸钠、硫酸铅以及其他硫酸盐、碳酸盐和氧化物的热释光
DOI：
10.1021/j150551a028
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发表时间：
1957
期刊：
影响因子：
--
通讯作者：
L. E. Moore
中科院分区：
文献类型：
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作者：
L. E. Moore
研究了几种硫酸盐、碳酸盐和氧化物的辐射诱导热释光。硫酸钠的热释光受脱水方法和结晶过程中吸收的杂质的影响。硫酸铅并不热致发光，但加入某些杂质离子后便会产生热致发光。本实验室曾研究晶体的热致发光，特别是碱金属卤化物和碳酸钙。在将晶体暴露于辐射后，它们在黑暗中加热，并记录光发射的温度，给出“辉光曲线”。碳酸钙的发光曲线明显地受到沉淀材料的溶液中的杂质的影响。各种杂质的加入都能诱导、增大或减小光强-温度曲线的最大值。在某些情况下，杂质含量可以从辉光曲线预测，反之亦然。这一事实表明，热释光可能是一个有用的分析工具，在研究近纯晶体化合物。它对极少量的杂质敏感-试剂级纯度远低于热释光纯度。热致发光可以是也可以不是主体晶体的固有性质。纯晶体可以给出基本的热致发光图案，该图案被缺陷改变，或者热致发光可以由杂质离子的存在或辐射对晶体的影响引起。
Radiation-induced thermoluminescence has been studied for several sulfates, carbonates and oxides. The thermolumines-cence of sodium sulfate is affectedby the method of dehydration and by the impurities taken up on crystallization. Lead sulfate is not thermoluminescent, but is rendered so by the addition of certain impurity ions.The thermoluminescence of crystals has been studied in this Laboratory, 8* particularly the alkali halides8* 5 and calcium carbonate. After exposing the crystals to-radiation they are heated in the dark and the temperatures at which light is emitted are recorded, giving a “glow curve.” The glow curve of calcium carbonate is markedly affected by the impurities in the solution from which the material is precipitated. Maxima in the light intensity-temperature curves can be induced, in-creased or decreased by the addition of various impurities. In some cases, impurity content can be predicted from the glow curve and vice versa. This fact suggested that thermoluminescence might be useful as an analytical tool in studies of nearly pure crystalline compounds. It is sensitive to very small quantities of impurities—reagent grade purity is far from thermoluminescence purity. Thermoluminescence may or may not be an in-herent property of the host crystal. The pure crystal may give a basic therrtioluminescence pattern which is modified by imperfections, or the thermo-luminescence may arise from the presence of im-purity ions or from effects of radiation on the crystal.