%0 Journal Article
%T Determination of color centers in CaF2 crystals by multiple gamma-ray irradiations
%A Wei Chen
%A PingXin Song
%A YongJun Dong
%A YingJiu Zhang
%A Wei Hua
%J Chinese Science Bulletin
%@ 1861-9541
%D 2013
%I 
%R 10.1007/s11434-012-5615-z
%X Color centers of CaF2 crystals subjected to three high-dose gamma-ray irradiation treatments were studied. Three absorption bands at 349, 409 and 478 nm are ascribed to the F interstitials through the variation in difference additional absorption values. The transformation of interstitial F atoms to F ions (Fi  ) is demonstrated using data with increasing radiation dose. The decrease in the 600 nm absorption band and the occurrence of the 580 nm band correspond to F2 + center conversion to F center. The complex (F -Fi 0) might be associated with the 962 and 1196 nm bands.
%K CaF2
%K TGT
%K gamma-ray
%K irradiation
%K color centers
%K crystals
%U http://link.springer.com/article/10.1007/s11434-012-5615-z