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2. Surface charge of environmental and radioactive airborne particles

Author

Tyler L. Spano, Austin Ladshaw, Kristian G. Myhre, Sotira Yiacoumi, Alexander I. Wiechert, Gyoung Gug Jang, Costas Tsouris, and Joanna McFarlane

Subjects
Materials science, Physics::Medical Physics, Charge density, chemistry.chemical_element, Charge (physics), Particulates, Uranium, complex mixtures, Physics::Geophysics, chemistry.chemical_compound, chemistry, Chemical physics, Uranium oxide, Particle, Surface charge, Particle size, Astrophysics::Earth and Planetary Astrophysics
Abstract

Self-charging of radioactive uranium oxide particles was measured by comparing the electrostatic surface-charge characteristics of the uranium particles to various airborne dust particulates. Though radioactive aerosols can gain charge through various decay mechanisms, researchers have traditionally assumed that the radioactive aerosols do not carry any additional charge relative to other atmospheric dust particles as a consequence of charge neutralization over time. In this work, we evaluate this assumption by directly examining the surface charge and charge density on airborne uranium oxide particles and then comparing those characteristics with charging of other natural and engineered airborne dust particles. Based on electric field–assisted particle levitation in air, the surface charge, charge distribution as a function of particle size, and surface charge density were determined for uranium oxide aerosols (

Published
2021

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