Thermoluminescence and Color Centers in LiF
Thermoluminescence and Color Centers in LiF
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LiF 中的热释光和色心
DOI：
10.1063/1.1709837
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发表时间：
1967
影响因子：
3.2
通讯作者：
R. R. Wilbarg
中科院分区：
文献类型：
--
作者：
R. W. Christy;N. Johnson;R. R. Wilbarg
研究了伽马射线辐照下LiF晶体室温以上的热释光发射和光吸收，重点讨论了在辐射剂量学中应用最感兴趣的条件。样品是不同纯度的Harshaw晶体，目的是将热释光中涉及的电子和空穴陷阱和重组中心与捕获载流子产生的光吸收带联系起来。经过适当处理的晶体的主要发光峰出现在200°C左右，并且通过热释光和光吸收的热漂白和光学漂白与310 μ m的吸收带相关。在100°C时，一个较小的发光峰与380 μ m的吸收带相关。在250 μ m处的F中心吸收似乎是与两个发光峰相关的电子陷阱。结果表明，310和380 μ m的中心是空穴中心，它们被热电离后发生热释光。…
Thermoluminescence emission above room temperature and optical absorption have been studied in LiF crystals irradiated by gamma rays, with emphasis on conditions which are of greatest interest for applications to radiation dosimetry. The specimens were Harshaw crystals of differing purity, and the purpose was to correlate the electron and hole traps and recombination centers involved in the thermoluminescence with optical‐absorption bands produced by the trapped carriers. The dominant glow peak in suitably treated crystals occurs at about 200°C, and this is correlated with an absorption band at 310 mμ, through thermal and optical bleaching of the thermoluminescence and optical absorption. A smaller glow peak at 100°C is correlated with an absorption band at 380 mμ. The F center absorbing at 250 mμ appears to be the electron trap associated with both glow peaks. It is concluded that the 310‐ and 380‐mμ centers are trapped‐hole centers, and the thermoluminescence occurs after they are thermally ionized. The...