Abstract

AbstractThe defects formed by introduction of Ca2+ ions in NaCl and NaBr single crystals and after UV irradiation at room temperature have been observed by the electron spin resonance method. Two types of paramagnetic centres have been detected: one with axial symmetry and the other with orthorhombic symmetry. The highly anisotropic g‐factor of these centres proves that the responsible electron for the observed absorption is not in an s state. The formed centres decay at approximate 400 °K.

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