Publication date: April 2018
Source:Journal of Environmental Radioactivity, Volumes 184–185
Author(s): D.M. Murphy, K.D. Froyd, E. Apel, D. Blake, N. Blake, N. Evangeliou, R.S. Hornbrook, J. Peischl, E. Ray, T.B. Ryerson, C. Thompson, A. Stohl
We describe a submicron aerosol particle sampled at an altitude of 7 km near the Aleutian Islands that contained a small percentage of enriched uranium oxide. 235U was 3.1 ± 0.5% of 238U. During twenty years of aircraft sampling of millions of particles in the global atmosphere, we have rarely encountered a particle with a similarly high content of 238U and never a particle with enriched 235U. The bulk of the particle consisted of material consistent with combustion of heavy fuel oil. Analysis of wind trajectories and particle dispersion model results show that the particle could have originated from a variety of areas across Asia. The source of such a particle is unclear, and the particle is described here in case it indicates a novel source where enriched uranium was dispersed.
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Τρίτη 13 Φεβρουαρίου 2018
An aerosol particle containing enriched uranium encountered in the remote upper troposphere
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