ASPECTS OF THE DEPOSITION OF RADIOACTIVE AND OTHER GASES AND PARTICLES
Journal Article
·
· Intern. J. Air Pollution
OSTI ID:4099290
Studies on the deposition of radioactive aerosols from the air to the ground are described. Fission products may be found in the vapor form, as is I/ sup 131/, or adsorbed on very small particles (condensation nuclei). The particles are too small to have appreciable terminal velocity but are subject to Brownian motion and to electrostatic forces, by which means they are deposited. The terminal velocities are about 10/sup -4/ cm/sec or less, but the dry deposition to surfaces is about 10/sup -2/ to 10/sup -1/ cm/sec. Activity in this form is also subject to deposition in rain. Velocities of deposition of 1 cm/sec are found for the dry deposition of I/sup 131/ vapor. The modes of deposition are by diffusion, eddy diffusion in free air, and molecular diffusion across laminar boundary layers. (B.O.G.)
- Research Organization:
- Atomic Energy Research Establishment, Harwell, Berks, England
- NSA Number:
- NSA-15-009206
- OSTI ID:
- 4099290
- Journal Information:
- Intern. J. Air Pollution, Journal Name: Intern. J. Air Pollution Vol. Vol: 3
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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