title: Sucrose radical-production cross-section regarding heavy-ion irradiation.
abstract: We investigated the sucrose radical-production cross-section induced by heavy-ion irradiation. L-alanine was also used in order to compare radical yield and cross-section. The stable free radicals after irradiation were analyzed by electron paramagnetic resonance (EPR). The radical yield obtained by the irradiated samples had a logarithmic correlation with the LET (linear energy transfer). Quantitative EPR analyses showed that radical productions for sucrose and L-alanine vary both by different particle irradiation and the LET under the same absorbed dose. Furthermore, the cross-sections of radical productions for samples were calculated. Both cross-sections for C ions irradiation under LET 30 keV/microm at 50 Gy dose were approximately 3.0x10(-9) microm(2), taking account of the molecular areas of the samples. The values of the cross-sections imply that multiple ionizing particles involve producing stable radicals.
authors.affiliation: RI Research Center, Fukushima Medical University, 1 Hikarigaoka, Fukushima 960-1295, Japan. nakagawa@fmu.ac.jp
authors.forename: Kouichi
authors.initials: K
authors.lastname: Nakagawa
authors.forename: Nobuo
authors.initials: N
authors.lastname: Ikota
authors.forename: Kazunori
authors.initials: K
authors.lastname: Anzai
mesh_terms: D000409:Alanine / Q000528:radiation effects; D018360:Crystallography, X-Ray; D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals / Q000138:chemical synthesis*; D020450:Heavy Ions; D018499:Linear Energy Transfer; D011827:Radiation; D013395:Sucrose / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D005609:Free Radicals; D013395:Sucrose; D000409:Alanine