Study on KC1 Colorated Center Doped with Na+ Crystal by Positron Annihilation

The relation of the live times and S parameters with doped quantities of Na⁺ have been studied by positron annihilation method in pure,colourable and irradiant KC1 single crystals,The results show that the concentration of vacancies of KC1 doped with 800ppm Na⁺ is 4.24×10¹⁷/cm³.It is close to that of the pure KC1 crystal.The obvious F centers exist in the colorated crystal.The S parameters are mainly influenced by the external electrons of halide ions.Mechanism of annihilation of KC1 crystal doped with Na⁺ has been discussed.