Fizika Nizkikh Temperatur: Volume 27, Number 9-10 (September 2001), p. 1192-1201    ( to contents , go back )

The exciton luminescence under excess electron drift through liquid and solid rare gases

E. B. Gordon

Department of Institute for Energeticheskikh Problems of Chemical Physics RAS, 142432, Chernogolovka, Moscow district, Russia
E-mail: gordon@binep.ac.ru

A. F. Shestakov

Institute of Chemical Physics Problems RAS, Chernogolovka, Moscow district, 142432, Russia
E-mail: as@icp.ac.ru
pos Анотація:

Received June 25, 2001

Abstract

The excitation of the electronic states has been shown to be the main cause of energy losses of the excess electrons drifting in moderately strong (³103 V/nm) electric fields through condensed heavy rare gases (Rg). Such losses, together with electron scattering of the resonances of (Rg*)- metastable negative ions govern the dependences of the electron mean energy and the drift velocities on the field strength E both in condensed Rg and in dense gas. In particular, the constancy of the vd value at high E and the electroluminescense spectrum transformation under varying atom density and temperature have been explained. The possibility of the effective excitation of localized excitons in bulk solid and liquid Xe, Kr and Ar with the exciton (and VUV photon) yield up to 102 per electron has thus been predicted.

PACS:
78.55.-m - Photoluminescence, properties and materials
Download 277166 byte Download 1498727 byte View Contents