Following X-irradiation of OH-free NaCl(Ca) crystals at room temperature, the authors observed new absorption bands at 360, 336 and 193 nm wavelengths, in addition to the V2 band appearing in pure crystals at 223 nm. These new bands were assigned to VF, V1M and V2M centres, respectively. The M superscript refers to the presence of the divalent metal impurity, thus distinguishing the centres from similar centres in the pure crystal. In the case of X-irradiation at -80°C a new band was observed at 330 nm shown to be due to VKM centres. The models of the appearing centres are well-known, except in the case of V1M centres for which the authors propose a model.
ASJC Scopus subject areas
- Nuclear and High Energy Physics