Beschreibung:
<jats:title>Abstract</jats:title><jats:p>Ag<jats:sup>2+</jats:sup> centres are produced in doped and appropriately treated AgCl crystals by irradiation with blue light at 20 <jats:sup>°</jats:sup>K. It is shown that the only purpose of the preceding treatment is to create a high concentration of electron traps. In chalcogen doped crystals (AgCl:S, Se, Te) electron traps are formed by pre‐irradiation with blue light above 120 <jats:sup>°</jats:sup>K; in iron doped crystals the incorporated Fe<jats:sup>2+</jats:sup> ions are converted to Fe<jats:sup>3+</jats:sup>, acting as traps, either by irradiation at 20 <jats:sup>°</jats:sup>C or by annealing in chlorine gas. As the paramagnetic data of the localized Ag<jats:sup>2+</jats:sup> centres are independent of the kind of the impurity, one must conclude that the hole is trapped in the undisturbed lattice.</jats:p>