Untitled

Abstract

Pulsed electron-beam excitation of solid Ne films doped with 0.4 - 0.6% CsCl leads to fluorescence bands in the deep UV region. The strongest band at 220.1 nm (FWHM 13 nm) is assigned to the transition and a much weaker one at 249.2 nm (FWHM 15 nm) to the transition of the ions on the basis of transition energies (including dipole solvation) and line shapes. The 220.1 nm band provides a large cross section for stimulated emission of and the band intensity depends strongly on the CsCl content, with optimal values similar to that obtained for CsF. The homonuclear ) transition at 263.2 nm indicates that pre-dissociation occurs via the state.

Luminescence and formation of alkali-halide ionic excimers in solid Ne and Ar

“…In the low doping range exclusively an occurrence of the predissociation of molecules in the ionic state can be observed. This is confirmed by the detailed analysis of the CsF and CsCl spectra reported elsewhere [11,12] the range from about 0.4 up to 0.9% the optimal values of the dopant content correspond to the highest band intensities. The AX content larger than 0.9% results in a decrease of the B-X band intensities.…”

“…Since the problem was discussed for the CsCl elsewhere [12] here just features will be recalled which are valid for the general case of the A + X -ionic states. For this purpose it is convenient to consider the energy of states in units equal to the binding potential of the AX ground state and the internuclear separation in units of equilibrium distance r e -see S , potential curves in Fig.…”

“…Recently deep UV fluorescence bands of A 2+ Xions were observed for CsF, CsCl and RbF isolated in Ne and Ar matrices under e-beam excitation [11,12] …”