ION-DEPENDENT LUMINESCENCE OF PULSE-IRRADIATED AQUEOUS-ELECTROLYTE SOLUTIONS AT VERY-LOW TEMPERATURES .1. CATION INFLUENCE ON THE EMISSION OF POLYCRYSTALLINE CHLORIDE ICES

Emission spectra from the pulse-irradiated 4 M aqueous solutions of al kaline metal chlorides observed in the temperature range of 6-50 K and their mu s-time evolution are reported. It has been found that the lu minescence yield as well as the position of maximum (lambda(max)) in t he emission spectra are dependent on the nature of Me(+) cations, the presence of Cl- anions and temperature of the matrix. In all aqueous p olycrystalline matrices as well as in H2O ice, the emission band at la mbda(max) congruent to 330 nm, which is ascribed to OH A(2) Sigma --> X(2)II transition appeared at temperatures below 30 K.