{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/70907"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/70907","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"The Kinetics of Neutralization of Polonium-218","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.","abstract_html":"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.","abstract_has_math":true,"creators":["Chu, Kai-Dee"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Nuclear Engineering","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-16T04:17:41Z","date_published":"2014-12-16T04:17:41Z","updated_at":"2026-07-22T22:26:03Z","subjects":["Environmental Sciences"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8721609"],"render_values":[{"text":"(UMI)AAI8721609","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/70907","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Chu, Kai-Dee"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-16T04:17:41Z","10000-01-01","1987"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Nuclear Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Environmental Sciences"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/70907","(UMI)AAI8721609"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["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.","Made available in DSpace on 2014-12-16T04:17:41Z (GMT). No. of bitstreams: 1 8721609.pdf: 2193847 bytes, checksum: 94b1c8a3e3209427d2ef4152ed0beeb9 (MD5) Previous issue date: 1987","Embargo set by: Seth Robbins for item 71073 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","94 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1987."]},{"key":"dc:title","label":"Title","values":["The Kinetics of Neutralization of Polonium-218"]}]}],"canonical_facts":{"dc:creator":["Chu, Kai-Dee"],"dc:date":["2014-12-16T04:17:41Z","10000-01-01","1987"],"dc:description":["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.","Made available in DSpace on 2014-12-16T04:17:41Z (GMT). No. of bitstreams: 1 8721609.pdf: 2193847 bytes, checksum: 94b1c8a3e3209427d2ef4152ed0beeb9 (MD5) Previous issue date: 1987","Embargo set by: Seth Robbins for item 71073 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","94 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1987."],"dc:identifier":["http://hdl.handle.net/2142/70907","(UMI)AAI8721609"],"dc:subject":["Environmental Sciences"],"dc:title":["The Kinetics of Neutralization of Polonium-218"],"dc:type":["text"],"thesis:degree_discipline":["Nuclear Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:03Z"}