@article{oai:nifs-repository.repo.nii.ac.jp:00005504,
 author = {Iwakiri,  H. and Nakamori,  R. and Inamine,  S. and Yoshida,  A. and Yoshida,  N. and Watanabe,  H. and Kato,  D.},
 journal = {Annual Report of National Institute for Fusion Science},
 month = {2016-03-15},
 title = {Irradiation Effects of Low Energy Helium Ions on Optical Absorption of CaF2},
 volume = {Annual Report Apr.2012 - Mar.2013},
 year = {}
}