消除石英中碱金属离子迁移引起的辐射诱发频移

Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218) Pub Date : 2001-06-06 DOI:10.1109/FREQ.2001.956208

A. Halperin

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引用次数: 0

摘要

石英中通常含有AI杂质取代晶格中的硅，以一价离子作为Al处的电荷补偿器。发现电离辐射会引起石英谐振器中的频率偏移，这是由一价离子在晶格中的迁移引起的。本文采用热释光技术研究了Li/sup +/单价离子的迁移。这项研究提出了一种将Li离子从Al转移到它们形成热稳定电子陷阱的位置的方法。它们就不能在晶格中迁移了。发现350 K的辐照使可迁移的Li离子浓度降低了两个数量级。

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Elimination of radiation induced frequency-shifts caused by migration of alkali-metal ions in quartz

Quartz usually contains AI impurities substituted for silicon in the lattice, with monovalent ions, as charge compensators at the Al. Ionizing radiation was found to induce frequency shifts in quartz resonators, caused by the migration in the lattice of the monovalent ions. Thermoluminescence was used in the present work to investigate the migration of the monovalent ions, Li/sup +/ in the present work. The investigation suggested a way to transfer the Li ions from the Al to sites where they form thermally stable electron traps. They are then not available for migration in the lattice. Irradiation at 350 K was found to reduce the concentration of the Li ions available for migration by two orders of magnitude.

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Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218)

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