|Researchers at Purdue University have developed a new method to remove radon isotopes and their decay chain products and detect alpha-emitting actinides (plutonium and uranium isotopes) in air. Alpha-emitting actinides have negative health consequences; they are 1000-10,000 more harmful than radon gas, which is also radioactive. Current methods to detect alpha-emitting actinides in air suffer from low detection efficiency and lengthy detection times and can be overwhelmed by background radiation. The Purdue technology functions at a 10 times faster rate and with approximately 100% intrinsic alpha & neutron detection efficiency while remaining 100% blind to background (gamma-beta and radon-related) radiation.
Technology Validation: For each of the four plutonium-239 : plutonium-240 ratios tested, the method predicted the most likely ratio compositions. Also, the method accurately classified 90% of the mixtures tested in the experiments.
Related Publication: Hemesath, M., Boyle, N., Archambault, B., Lorier, T., DiPrete, D., Taleyarkhan, R. (2022). Actinide in Air (Rn-Progeny Rejected) Alpha Spectroscopy with Tensioned Metastable Fluid Detectors. Journal of Nuclear Engineering and Radiation Science, Vol. 8/022001-1-to-9, April 2022.
- Continuous air monitors with Rn rejection
- Spectroscopic alpha-neutron detection in extreme (to 15,000 R/h) background gamma-beta radiation fields.
Jan 20, 2022
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