학술논문
Radiation damage of pure and doped KMgF/sub 3/ crystals
Document Type
Conference
Author
Source
Proceedings of 1994 IEEE Nuclear Science Symposium - NSS'94 Nuclear science and medical imaging Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record. 1:106-110 vol.1 1994
Subject
Language
Abstract
The radiation damage nature of pure and doped KMgF/sub 3/ crystals was studied on the basis of the absorption emission excitation and thermoluminescence (TL) spectra. It is shown that the sensitivity of this material to the ionizing irradiation is defined not only own color centers but by the presence of oxygen impurities too. The availability of oxygen in KMgF/sub 3/ is revealed in additional absorption and emission bands, high temperature (T>400/spl deg/C) peaks of TL, UV-energy storage. From the RE doped KMgF/sub 3/ crystals the most illustrative results were obtained for EuF/sub 3/ and Eu/sub 2/O/sub 3/ doped samples. High emission efficiency corresponds to the f-f transitions in Eu/sup 2+/ ions and trap's structure is connected as with intrinsic point defects as with oxygen impurity contents. The most intensive TL-peak is at 390/spl deg/C and in crystals with Eu/sub 2/O/sub 3/ it's in many times higher than in those with EuF/sub 3/. It is shown that KMgF/sub 3/:Eu/sub 2/O/sub 3/ is an effective dosimeter not only for X-ray but for UV-registration too.ETX