Vacuum ultraviolet transitions from rare-gas alkali ionic excimers (XeRb)+ and (KrRb)+ by electron beam excitation

Abstract

Vacuum UV fluorescences from ionic rare-gas alkali excimer molecules were observed by electron beam excitation. A gas mixture of xenon or krypton with a hot vapor of rubidium was excited to obtain a diffuse emission band centered at 164 nm from (XeRb)+ and 133 nm from (KrRb)+ molecular ions. The observed emission bands are assigned to the 21Σ+→11Σ+ transition of (XeRb)+ and (KrRb)+, respectively.