Whenever radioactivity is released to the atmosphere, for example by the detonation of nuclear weapons or the testing of nuclear weapons or from nuclear reactor accidents that fraction of it which remains airborne for more than a few hours is liable to be attached to aerosol particles. The resulting radioactive aerosols are carried by atmospheric mixing processes until they settle out or are scavenged by precipitation. The radiation exposure pathway of maximum concern to humans is by inhalation of aerosols and their deposition in the respiratory tract. In this context, it is important to note that radioactive aerosols are commonly of natural origin alos. In particular, the associated radionuclides can be of natural terrestrial origin, such as the decay products of radon gas, or they can e cosmogenic, such as beryllium-7. The exposure of miners of uranium and other ores and minerals to radon and its aerosol-borne decay products is of major significance. The book describes the formation of aerosols, their aerodynamic size distribution, their atmospheric residence time, their sampling and measurement, the range of radioactive aerosols found and studied thus far, including man-made nuclides and radon decay products and their interaction with man, including deposition in the lung and subsequent health effects.
Advanced level science handbook for researchers, scientists and academics
Covers all aspects of radiation exposure in humans, including subsequent health implications
Presents the latest findings and analysis in this highly topical area
Researchers and industry scientists in radiation biology, environmental sciences, ecology, radiation engineering; radiation safety officers; public health and government agencies; advanced students in environmental health physics, environmental radioactivity, radiological environmental surveillance, or nuclear waste management.
Table of Contents
1. Physics of Atmospheric Aerosol Particles. 2. Radon Decay Product Aerosols. 3. Fallout Aerosols. 4. Cosmogenic Radionuclide Aerosols. 5. Mine Aerosols. 6. Environmental Transport of Radioactive Aerosols. 7. Residence Times of Radioactive Aerosols. 8. Radioactive Particles and Human Subjects. 9. Radioactive Aerosol Measurements: Principles, Techniques and Applications.