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Generation of O-2 molecular ions in electron-irradiated KBr and KI crystals

1982; Elsevier BV; Volume: 27; Issue: 3 Linguagem: Inglês

10.1016/0022-2313(82)90011-4

1872-7883

R. Cywiński, J. Z. Damm,

Solid-state spectroscopy and crystallography

It is shown that during electron irradiation of KBr and KI crystals at 80 K a vibronic structure develops in the emission spectrum characteristic of O-2 molecular ions. The origin of these ions is explained in terms of the processes following the radiolysis of OH- impurity ions. Total disappearance (thermal quenching) of the vibronic structure T#62;170 K for KBr and T#62;110 K for KI is attributed to the reaction between mobile X-2 (Vk) centres and O-2 molecular ions resulting in the formation of optically inactive O2 molecules.