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Radiation Protection Dosimetry 58:93-101 (1995)
© 1995 Oxford University Press

Theory of Mutation Induction by Accelerated Very Heavy Ions in Cells

S. Kozubek, G. Horneck and L. Rýznar

Stochastic effects of ionising radiation in humans are related to mutation induction in cells. Therefore experimental data on mutation induction represents one of the endpoints used for the estimation of risk in radiation protection. Only very rough estimates can be made owing to the fact that a suitable theoretical approach does not exist. A simple method is proposed for the evaluation of the efficiency of mutation induction by accelerated very heavy ions in mammalian cells. The approach is based on the calculation of the fraction of energy deposited by accelerated particles in indirect collision (hits) in the cells. Two different modes of particle mutagenic action can be distinguished. s ray mutagenesis is related to those particles that preferentially kill the cells in direct hits. Track-core mutagenesis arises from direct hits and is observed for lighter ions or ions with very high energy (LET (500 keV.µm-1). Available experimental data agree reasonably well with the results based on theory.


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