用6Li(n,α)t反应研究在直流电场作用下α-LiIO3中锂离子的迁移

利用热中子照射α-LiIO₃单晶产生的⁶Li(n,α)t核反应,较细致地研究了α-LiIO₃单晶中Li离子在沿c向直流电场下的迁移,本方法可以非破坏性地、连续地观察Li离子在直流电场下迁移的情况。结果表明,样品中的Li离子在电荷量达到0.1C时,已渗入铝电极,约0.3C时已穿出铝电极,达到电极外表面。还得到了不同电量下,Li离子在不同深度的相对浓度分布。关键词：

A STUDY ON MIGRATION OF Li IONS IN α-LiIO3 SINGLE CRYSTAL UNDER AN ELECTROSTATIC FIELD APPLIED ALONG THE c-AXIS BY 6Li (n, α)t NUCLEAR REACTION

The detailed information about the migration of Li ions under an DC electric field applied along the c-axis of an α-LiI0₃ single crystal has been obtained by analysing the spectrum of the nuclear reaction ⁶Li (n, α)t in the single crystal bombarded by thermal neutrons. The migration of Li ions in the crystal can be continuously studied non-destructively by this method. The results show that the Li ions have migrated into Al-electrode when 0.1 Columb of charge is accumulated and have penetrated the Al-electrode at 0.3 Columb. The relutive density of the Li ions at various depth in the single crystal have also been measured versus different amount of accumulated charge.