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Experimental Study on the Biological Effect of Cluster Ion Beams in Bacillus subtilis Spores

机译：枯草芽孢杆菌孢子中簇离子束生物学效应的实验研究

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Cluster ion beams have unique features in energy deposition, but their biological effects are yet to be examined. In this study, we employed bacterial spores as a model organism, established an irradiation method, and examined the lethal effect of 2 MeV C, 4 MeV C2, and 6 MeV C3 ion beams. The lethal effect per particle (per number of molecular ions) was not significantly different between cluster and monomer ion beams. The relative biological effectiveness and inactivation cross section as a function of linear energy transfer (LET) suggested that the single atoms of 2 MeV C deposited enough energy to kill the spores, and, therefore, there was no significant difference between the cluster and monomer ion beams in the cell killing effect under this experimental condition. We also considered the behavior of the atoms of cluster ions in the spores after the dissociation of cluster ions into monomer ions by losing bonding electrons through inelastic collisions with atoms on the surface. To the best of our knowledge, this is the first report to provide a basis for examining the biological effect of cluster ions.
机译：聚类离子束在能量沉积中具有独特的特征，但尚未检查它们的生物学效应。在这项研究中，我们使用细菌孢子作为模型生物，建立了一种照射方法，并检查了2mev C，4 MeV C2和6MeV C3离子束的致命作用。每种颗粒（每次数的分子离子）在簇和单体离子束之间没有显着差异的致命作用。作为线性能量转移（Let）的函数的相对生物有效性和灭活横截面表明，2 MeV C的单个原子沉积足够的能量以杀死孢子，因此簇和单体离子之间没有显着差异在该实验条件下细胞杀伤效果中的光束。我们还考虑了通过使粘合电子通过与表面上的原子的内部碰撞使粘合电子解离簇离子离子将孢子离子分离成单体离子之后的孢子中的孢子中的原子的行为。据我们所知，这是第一份为检查群体离子的生物学效应提供依据的报告。

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