@article{oai:repo.qst.go.jp:00055251,
 author = {峯岸, 安津子 and 長崎, 淳 and 森, 和亮 and 天野, 力 and 高木, 伸司 and 村上, 健 and 金井, 達明 and 古澤, 佳也 and 岩田, 佳之 and 峯岸 安津子 and 長崎 淳 and 森 和亮 and 高木 伸司 and 村上 健 and 金井 達明 and 古澤 佳也 and 岩田 佳之},
 journal = {放射線医学総合研究所重粒子線がん治療装置等共同利用研究報告書},
 month = {Apr},
 note = {The characteristics of irradiation with C290MeV/u ion beams were investigated using X-band ESR spectroscopy for a polycrystalline powder of L-alpha-alanine at from 77K to 310K. The formed main radicals at 190K~310K were the deamino radical and the decarboxyl radical. Because of the first-derivative ESR, decarboxyl radical showed an expanded spectral width and a lower peak height because of its amino hydrogen and nitrogen than that of the same amount of deamino radical. The ESR of irradiated L-alpha-alanine predominantly indicates the spectrum of the deamino radical. On the irradiated, L-alpha-alanine at from 77K to 310K ESR showed 1:4:6:4:1 lines at 220K and at room temperature, which indicate that the methyl group of the radical was rotating. On the other hand, at 77K ESR the spectrum showed nearly 1:5:5:5:1 lines, like the teeth of a saw, on samples irradiated at 270~ 350K (range IV), and 1:4:6:4:1 lines for those irradiated at 180-260K (range II and III), respectively. It is considered that the radical conformation of the deamino radical is planar (most stable conformation) on an irradiated sample in range IV, and a pyramidal structure on the irradiated sample in ranges II and III.},
 pages = {197--199},
 title = {αアラニンおよびＮアセチルアラニンの重粒子線照射で生成するラジカルの検出},
 volume = {2002},
 year = {2002}
}