Al-related centers in relation to γ-irradiation
Al-related centers in relation to γ-irradiation
复制标题
与 γ 辐射相关的 Al 相关中心
DOI：
10.1007/s002690050037
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发表时间：
1997
影响因子：
1.4
通讯作者：
H. Iwasaki
中科院分区：
文献类型：
--
作者：
P. Guzzo;F. Iwasaki;H. Iwasaki
本文研究了巴西天然石英中Si−Al置换的电荷补偿问题，并与γ-辐照暗化响应和用原子吸收光谱法和红外吸收光谱法测定的杂质含量有关。天然石英中的Al+3被Li+和H+补偿，形成Al−Li和Al−OH中心。（Al-Li）/（Al-OH）和Li/（宽OH带）的含量比取决于晶体生长的环境条件，并影响由于γ辐照而形成的Al空穴中心。热液成因石英中Al相关中心以Al-OH中心为主，伟晶岩成因石英中Al相关中心以Al-Li中心为主。石英中Al孔心的形成较少，OH宽带含量高，为低温热液成因。
The charge compensation problem for Si−Al substitution in Brazilian natural quartz is investigated in relation to γ-irradiation darkening response and impurity contents evaluated by atomic absorption spectrometry and infrared absorption spectroscopy. Al+3in as-grown natural quartz is compensated by Li+and H+to form Al−Li and Al−OH centers. The content ratios (Al−Li)/(Al−OH) and Li/(broad OH band) depend on the environmental conditions of crystal growth and influence the formation of Al-hole centers due to γ-irradiation. Al−OH centers are the dominant Al-related centers in quartz from hydrothermal origin while Al−Li centers are dominant for that of pegmatitic origin. The formation of Al-hole centers is little in quartz with a high content of broad OH band which is from low temperature hydrothermal origin.