Abstract.
We investigated the details of sucrose and L-α-alanine radicals produced by heavy-ion irradiation with various linear energy transfer (LET) values. The impact of the heavy ions on samples produced stable free radicals, which were analyzed by electron paramagnetic resonance (EPR). The spectral patterns obtained were similar among those for the irradiation of carbon (C), neon (Ne), silicon (Si), and argon (Ar) ions. The radical production of irradiated sucrose and alanine samples showed a linear relation with the absorbed dose. The total spin concentration obtained by heavy-ion irradiation decreases as logarithmic function of the LET. Quantitative EPR analysis showed that the production of sucrose and alanine radicals depended on both the ion species and the LET values under the same dose. Moreover, the radical-production cross sections for sucrose and alanine irradiated with C ions (290 MeV/u) were about 1.3 · 10−8 and about 3.0 · 10−9 µm2, respectively. The results of the cross section suggest that each molecule becomes a stable radical with the interaction of several particles.
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Authors' address: Kouichi Nakagawa, Radioisotope Research Center, Fukushima Medical University, 1 Hikari-gaoka, Fukushima 960-1295, Japan
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Nakagawa, K., Ikota, N. & Sato, Y. Heavy-Ion-Induced Sucrose and L-α-Alanine Radicals Investigated by EPR. Appl Magn Reson 33, 111–116 (2008). https://doi.org/10.1007/s00723-008-0052-5
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DOI: https://doi.org/10.1007/s00723-008-0052-5