{"id":{"repo_id":"mo-state","oai_identifier":"oai:bearworks.missouristate.edu:theses-1528"},"canonical_url":"https://search.dev.ndltd.org/etd/mo-state/oai:bearworks.missouristate.edu:theses-1528","repository":{"repo_id":"mo-state","name":"Missouri State University","base_url":"https://bearworks.missouristate.edu/do/oai/"},"display":{"title":"Indoor Concentration Simulation of Radon Isotopes and Their Decay Products","abstract":"The indoor concentrations of radon isotopes and progeny in indoor air can be viewed as a function of their outdoor concentration, the rate of emanation from inside, ventilation, deposition, and resuspension. Steady-state and time-dependent equations, derived by Thompson, were used to evaluate the relative effects of these variables on the potential alpha energy concentraiton (PAEC). Steady-state equations showed that at higher ventilation rates PAEC reduction of radon (Rn) is influenced more by ventilation than by progeny deposition, and at medium and higher deposition rates, the PAEC reduction of thoron (Tn) is affected little by ventilation. Calculations also show that the PAEC (Tn):PAEC (Rn) ratio increases, decreases, or remains constant, depending upon the ventilation rate. Calculations using the time-dependent equations showed that steady-state behavior was attained in 3 to 6 hours. The PAEC (Tn):PAEC (Rn) ratio, for time equal to 3 to 6 hours, was also shown to increase, decrease, or remains constant, depending upon the ventilation rate. For times under 3 hours, the PAEC (Tn):PAEC (Rn) ratio was shown to decrease with increased ventilation.","abstract_html":"The indoor concentrations of radon isotopes and progeny in indoor air can be viewed as a function of their outdoor concentration, the rate of emanation from inside, ventilation, deposition, and resuspension. Steady-state and time-dependent equations, derived by Thompson, were used to evaluate the relative effects of these variables on the potential alpha energy concentraiton (PAEC). Steady-state equations showed that at higher ventilation rates PAEC reduction of radon (Rn) is influenced more by ventilation than by progeny deposition, and at medium and higher deposition rates, the PAEC reduction of thoron (Tn) is affected little by ventilation. Calculations also show that the PAEC (Tn):PAEC (Rn) ratio increases, decreases, or remains constant, depending upon the ventilation rate. Calculations using the time-dependent equations showed that steady-state behavior was attained in 3 to 6 hours. The PAEC (Tn):PAEC (Rn) ratio, for time equal to 3 to 6 hours, was also shown to increase, decrease, or remains constant, depending upon the ventilation rate. For times under 3 hours, the PAEC (Tn):PAEC (Rn) ratio was shown to decrease with increased ventilation.","abstract_has_math":false,"creators":["Dial, Paul Douglas"],"institution":null,"degree_name":"Master of Science in Chemistry","degree_level":"Masters","degree_discipline":"Chemistry and Biochemistry","degree_department":null,"school":null,"contributors":["Clifton Thompson"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1996,"date_issued":"1996-12-01T08:00:00Z","date_published":"1996-12-01T08:00:00Z","updated_at":"2026-07-24T03:15:29Z","subjects":["Chemistry"],"languages":[],"rights":["© Paul Douglas Dial"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://bearworks.missouristate.edu/theses/527","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Clifton Thompson"]},{"key":"dc:creator","label":"Author","values":["Dial, Paul Douglas"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemistry and Biochemistry"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science in Chemistry"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Chemistry"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["© Paul Douglas Dial"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://bearworks.missouristate.edu/theses/527"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The indoor concentrations of radon isotopes and progeny in indoor air can be viewed as a function of their outdoor concentration, the rate of emanation from inside, ventilation, deposition, and resuspension. Steady-state and time-dependent equations, derived by Thompson, were used to evaluate the relative effects of these variables on the potential alpha energy concentraiton (PAEC). Steady-state equations showed that at higher ventilation rates PAEC reduction of radon (Rn) is influenced more by ventilation than by progeny deposition, and at medium and higher deposition rates, the PAEC reduction of thoron (Tn) is affected little by ventilation. Calculations also show that the PAEC (Tn):PAEC (Rn) ratio increases, decreases, or remains constant, depending upon the ventilation rate. Calculations using the time-dependent equations showed that steady-state behavior was attained in 3 to 6 hours. The PAEC (Tn):PAEC (Rn) ratio, for time equal to 3 to 6 hours, was also shown to increase, decrease, or remains constant, depending upon the ventilation rate. For times under 3 hours, the PAEC (Tn):PAEC (Rn) ratio was shown to decrease with increased ventilation."]},{"key":"dc:title","label":"Title","values":["Indoor Concentration Simulation of Radon Isotopes and Their Decay Products"]}]}],"canonical_facts":{"dc:contributor":["Clifton Thompson"],"dc:creator":["Dial, Paul Douglas"],"dc:description.abstract":["The indoor concentrations of radon isotopes and progeny in indoor air can be viewed as a function of their outdoor concentration, the rate of emanation from inside, ventilation, deposition, and resuspension. Steady-state and time-dependent equations, derived by Thompson, were used to evaluate the relative effects of these variables on the potential alpha energy concentraiton (PAEC). Steady-state equations showed that at higher ventilation rates PAEC reduction of radon (Rn) is influenced more by ventilation than by progeny deposition, and at medium and higher deposition rates, the PAEC reduction of thoron (Tn) is affected little by ventilation. Calculations also show that the PAEC (Tn):PAEC (Rn) ratio increases, decreases, or remains constant, depending upon the ventilation rate. Calculations using the time-dependent equations showed that steady-state behavior was attained in 3 to 6 hours. The PAEC (Tn):PAEC (Rn) ratio, for time equal to 3 to 6 hours, was also shown to increase, decrease, or remains constant, depending upon the ventilation rate. For times under 3 hours, the PAEC (Tn):PAEC (Rn) ratio was shown to decrease with increased ventilation."],"dc:identifier":["https://bearworks.missouristate.edu/theses/527"],"dc:rights":["© Paul Douglas Dial"],"dc:subject":["Chemistry"],"dc:title":["Indoor Concentration Simulation of Radon Isotopes and Their Decay Products"],"thesis:degree_discipline":["Chemistry and Biochemistry"],"thesis:degree_level":["Masters"],"thesis:degree_name":["Master of Science in Chemistry"]},"updated_at":"2026-07-24T03:15:29Z"}