Mutation induction in spores ofBacillus subtilis by accelerated very heavy ions

Abstract

Mutation induction (resistance to sodium azide) in spores ofBacillus subtilis was investigated after irradiation with heavy ions from Neon to Uranium with specific particle energies between 0.17 and 18.6 MeV/u. A strong dependence of the mutation induction cross section on particle charge and energy was observed. From the results it was concluded that mutation induction in bacterial spores by very heavy ions is mainly caused by secondary electrons.