Electron-impact excitation of Xe atoms in pure Xe gas and in a Xe(10%)-Ar(90%) mixture has led to the discovery of infrared (IR) luminescence of Xe2 excimers. The investigation of the emission spectrum at low density allows the identification of the molecular states involved in the transition. When the density is increased up to 40 times the density of the ideal gas at standard T and P, the interaction of the excimer with the dense environment produces a strong red-shift of the spectrum interpreted in terms of many-body effects.
Low- and high-density features of IR luminescence of Xe-2 excimers produced by electron impact
BORGHESANI, ARMANDO-FRANCESCO;CARUGNO, GIOVANNI;
2007
Abstract
Electron-impact excitation of Xe atoms in pure Xe gas and in a Xe(10%)-Ar(90%) mixture has led to the discovery of infrared (IR) luminescence of Xe2 excimers. The investigation of the emission spectrum at low density allows the identification of the molecular states involved in the transition. When the density is increased up to 40 times the density of the ideal gas at standard T and P, the interaction of the excimer with the dense environment produces a strong red-shift of the spectrum interpreted in terms of many-body effects.
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