α-石英发光
Luminescence of alpha-quartz
摘要：
在基质材料的发光中，综述了自陷激子的发光。这种发光，其频带位于2.6至2.7 eV，主要可以观察到电离辐射下的能量产额约0.2。STE不参与纯重组过程。主材料缺陷发光在5 eV出现在α-石英重照射后。它由中子辐照后的永久性缺陷和电子束辐照后的瞬态缺陷组成。在低于60 K的温度下可以很好地观察到这种发光。所有其他的发光都是不纯的。锗杂质在α石英中的发光被解释为锗附近的STE。铝和碱的络合物。其中之一是在6eV处的UV带，出现在低温下，并且只能在对（AlO4 Me）之间的隧穿复合过程中被激发，其中Me是捕获一个电子并且在铝四面体上保留一个空穴的碱金属离子。另一个带在3.4 eV的发光也是配合物（AlO4 Me）的发光，其行为类似于碱性铝硅酸盐玻璃的发光。第三个发光带在3 eV，可以观察到主要是在天然α-石英，明亮的温度低于200 K，被解释为STE在铝硅酸盐碎屑发光。碱金属离子与铜、银等贵金属离子的交换降低了铝碱配合物的原始发光，出现了贵金属离子的发光。铜的发光主带在3.4eV，银的发光主带在4.75eV，在500K以下都能观察到。它们的性质可以用离子内跃迁来描述。贵金属离子交换回碱金属离子更新了样品的初始发光。
英文摘要：
Among the host materials luminescence the luminescence of the self-trapped exciton (STE) is reviewed. This luminescence, which band is situated at 2.6 to 2.7 eV, could be observed mainly under ionising radiation with energetic yield about 0.2. The STE does not participate in pure recombination processes. Host material defect luminescence at 5 eV appears in alpha-quartz after heavy irradiation. It is constituted of permanent defect after neutron irradiation and transient defect after dens electron beam irradiation. This luminescence could be observed well at temperatures below 60 K. All another luminescence are of impurity nature. The Ge impurity luminescence in alpha-quartz explained as STE near Ge. The aluminium and alkali complexes. One of them is with UV band at 6 eV, appears at low temperatures and could be excited only in tunnelling recombination process between pairs (AlO4 Me), where Me is an alkali ion captured an electron and a hole remains on aluminium tetrahedron. Another luminescence with band at 3.4 eV is also luminescence of complexes (AlO4 Me), which behaviour is similar to the luminescence of alkali alumosilicate glass. The third luminescence with band at 3 eV could be observed mainly in natural alpha-quartz, bright at temperatures below 200 K and is interpreted as STE like luminescence at alumosilicate clasters. The exchange of alkali ions to noble ions of copper of silver reduces original luminescence of alumo alkali complexes and luminescence of noble ions appears. The main band of copper related luminescence is at 3.4 eV and that of silver is at 4.75 eV, both could be observed up to 500 K. their nature could be well described in terms of intraions transition. Exchange of noble ions back to alkali ions renews initial luminescence of the samples.
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