Continued X-ray Microanalysis of Radioactive Fall-out Particles during the Year 
1962

Rajewsky, Manfred F.

doi:10.1038/199162a0

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Continued X-ray Microanalysis of Radioactive Fall-out Particles during the Year 1962

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Rajewsky, Manfred F.
Max Planck Institute of Biophysics, Max Planck Society;

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Rajewsky, M. F. (1963). Continued X-ray Microanalysis of Radioactive Fall-out Particles during the Year 1962. Nature, 199, 162-163. doi:10.1038/199162a0.

Cite as: https://hdl.handle.net/21.11116/0000-0008-EB96-6

Abstract

SINCE the beginning of atom bomb tests, the physical and chemical properties as well as the biological effects of radioactive fall-out particles have been the subject of numerous investigations. Discussions on the mechanism of formation of these particles and on the question of their effects on the human organism after inhalation or ingestion, which are highly dependent on their solubility, require a knowledge of their composition. Comparison of particle diameters, obtained by electron microscopy, with the content of radioactive nuclides, determined by radiochemical methods and γ-spectrometry, shows that the particles contain more inactive material than is produced by the decay of the radioactive fission products and the induced radioactive elements. In the case of atmospheric explosions, this additional inactive component comes from unfissionable materials used in building the atomic device, and in the case of near-surface explosions also materials from the ground can be involved.