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 Title: The Kinetics of Neutralization of Polonium-218 Author(s): Chu, Kai-Dee Department / Program: Nuclear Engineering Discipline: Nuclear Engineering Degree Granting Institution: University of Illinois at Urbana-Champaign Degree: Ph.D. Genre: Dissertation Subject(s): Environmental Sciences Abstract: In a well-defined experimental system the neutralization of polonium-218 ions was investigated as a function of the physical and chemical properties of the controlled composition atmosphere. The mobilities of ${\rm Po}\sp+$ and ${\rm PoO}\sbsp{2}{+}$ are determined by combining experimental results with a computer model of the system. Three neutralization mechanisms were individually studied. The small ion recombination rate has been found to be proportional to the square root of radon concentration. The electron scavenging mechanism is responsible for the neutralization of ${\rm Po}\sp+$ in ${\rm NO}\sb2$ or ${\rm H\sb2O}$ in nitrogen. When ${\rm PoO}\sbsp{2}{+}$ is formed, the electron transfer mechanism dominates the neutralization process. The electron is transferred to ${\rm PoO}\sbsp{2}{+}$ from molecules with lower ionization potentials. The ionization potential of ${\rm PoO}\sbsp{2}{+}$ is also determined to be 10.44 $\pm$ 0.05 eV. Issue Date: 1987 Type: Text Description: 94 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1987. URI: http://hdl.handle.net/2142/70907 Other Identifier(s): (UMI)AAI8721609 Date Available in IDEALS: 2014-12-16 Date Deposited: 1987
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