Abstract
Radiation damage induced by X-irradiation in glasses with the composition (in mol%) 32 ZnF 2, 28 CdF 2, 20 BaF 2, 11 LiF, 5 AlF 3, 4 LaF 3 has been investigated by optical absorption and electron paramagnetic resonance (EPR). Some new absorption bands in the 250–700 nm region are produced by liquid nitrogen temperature (LNT) X-irradiation. Irradiation at room temperature (RT) produces limited absorption with the maximum at about 275 nm. A strong EPR signal at g = 2.014 likely due to hole trapped centers appears after RT irradiation. Samples irradiated at LNT also show another signal due to V K centers and some new lines in the g = 2 region. Some correlations have been found between EPR and optical signals but a definitive assignment is not yet possible.
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