@article{oai:repo.qst.go.jp:00046925, author = {Katagiri, Ken and Nagatsu, Koutarou and Minegishi, Katsuyuki and Houjou, Satoru and Muramatsu, Masayuki and Suzuki, Kazutoshi and Honma, Toshihiro and Kitagawa, Atsushi and Noda, Akira and Noda, Kouji and 片桐 健 and 永津 弘太郎 and 峯岸 克行 and 北條 悟 and 村松 正幸 and 鈴木 和年 and 本間 壽廣 and 北川 敦志 and 野田 章 and 野田 耕司}, journal = {REVIEW OF SCIENTIFIC INSTRUMENTS}, month = {Oct}, note = {Solid-state materials suitable for use as proton irradiation targets were investigated for producing high-purity 11CH4 molecules for heavy-ion cancer therapy. The radioactivity of gas produced by proton irradiation was measured for several target materials. Also, the radioactive molecular species of the produced gas were analyzed by radio gas chromatography.We found that 5 × 1012 11C molecules could be collected by proton irradiation on a NaBH4 target. We also found that the 11CH4 molecules were produced and collected directly from the irradiated target, owing to the hydrogen atoms bound in the solid-state NaBH4.}, pages = {02C305-1--02C305-3}, title = {11CH4-molecule production using a NaBH4 target for 11C-ion acceleration}, volume = {85}, year = {2013} }