Nakagawa Kouichi, Sato Yukio
RI Research Center, Fukushima Medical University, 1 Hikarigaoka, Fukushima 960-1295, Japan.
Spectrochim Acta A Mol Biomol Spectrosc. 2006 Mar 13;63(4):851-4. doi: 10.1016/j.saa.2005.10.015. Epub 2006 Feb 20.
Using electron paramagnetic resonance (EPR), we investigated the signal responses of sucrose and L-alpha-alanine radicals produced by heavy-ion irradiation with various linear energy transfers (LETs) and absorbed dose. The spin yields for the two compounds showed a linear relation with the absorbed dose, as well as a logarithmic correlation with the LET. A quantitative EPR analysis showed that sucrose was more sensitive to the particle species than that of alanine. Hence, the present EPR results imply that sucrose can be useful as a radiation indicator. Further analysis was carried out for the radical-production cross section, which showed that stable radicals of the two compounds were produced through collisions of several particles with a single molecule.
利用电子顺磁共振（EPR），我们研究了不同线性能量转移（LET）和吸收剂量的重离子辐照产生的蔗糖和L-α-丙氨酸自由基的信号响应。这两种化合物的自旋产率与吸收剂量呈线性关系，与LET呈对数相关。定量EPR分析表明，蔗糖比丙氨酸对粒子种类更敏感。因此，目前EPR结果表明蔗糖可作为一种辐射指示剂。对自由基产生截面进行了进一步分析，结果表明这两种化合物的稳定自由基是通过几个粒子与单个分子的碰撞产生 的
