O. Arimoto, M. Watanabe, T. Tsujibayashi, J. Azuma, M. Kamada, S. Nakanishi, H. Itoh, M. Itoh. Photostimulated detection of radiation defects produced by VUV light in BaF2. 7th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation. Proceedings of 7th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation. 2009