Effects of UV Exposure on E' Centers Formed in Crushed Quartz Grains
Effects of UV Exposure on E' Centers Formed in Crushed Quartz Grains
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紫外线照射对碎石英颗粒中形成的 E 中心的影响
DOI：
10.1143/jjap.35.4463
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发表时间：
1996
影响因子：
1.5
通讯作者：
M. Ikeya
中科院分区：
文献类型：
--
作者：
M. Hirai;M. Ikeya
电子自旋共振（ESR）研究了破碎石英（SiO2）中的E′中心，发现紫外线照射形成了一种新型的E′中心。另一方面，紫外辐照降低了破碎石英中γ辐照形成的E′中心的浓度。用紫外辐射可以区分破碎石英中的E′中心的三种类型（E′c：由破碎形成，E′UV：由破碎和紫外线照射形成，E′γ：由破碎和γ照射形成）。通过退火实验和计算机模拟，揭示了破碎后E′中心的活化能分布。紫外辐射表征技术将有助于评价SiO2，特别是天然石英中的局部应变。
Electron spin resonance (ESR) study of E' centers in crushed quartz (SiO2) indicated the formation of a new type of E' center by UV-irradiation. On the other hand, the concentration of E' centers formed by γ-irradiation in the crushed quartz is reduced by UV-irradiation. It was possible to distinguish between the three types of E' centers in crushed quartz (E' c: formed simply by crushing, E' UV: formed by crushing and UV-irradiation and E'γ: formed by crushing and γ-irradiation) using UV-irradiation. The distribution of the activation energy of the E' centers just after crushing was revealed by annealing experiments and computer simulation. The technique of characterization by UV-irradiation will be useful for evaluating the local strain in SiO2, especially in natural quartz.