@article{oai:nifs-repository.repo.nii.ac.jp:00009391,
 author = {Wada,  M. and Kasuya,  T. and Sasao,  M. and Nishiura,  M.},
 journal = {Annual Report of National Institute for Fusion Science},
 month = {2016-03-14},
 title = {Production of He? Ions by Surface Collisions of Metastable He Atoms},
 volume = {Annual Report Apr.1998 - Mar.1999},
 year = {}
}