Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/101628
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dc.contributor.authorSakr, S.en
dc.contributor.authorMostafa, M. Y. A.en
dc.contributor.authorMohamed, A.en
dc.contributor.authorMoustafa, M.en
dc.contributor.authorAhmed, A. A.en
dc.date.accessioned2021-08-31T14:58:33Z-
dc.date.available2021-08-31T14:58:33Z-
dc.date.issued2019-
dc.identifier.citationEffect of activity particle size distribution on deposition fraction of inhaled radon decay products in human respiratory system / S. Sakr, M. Y. A. Mostafa, A. Mohamed, et al. — DOI 10.1063/1.5134290 // AIP Conference Proceedings. — 2019. — Vol. 2174. — 020139.en
dc.identifier.isbn9780735419216-
dc.identifier.issn0094243X-
dc.identifier.otherFinal2
dc.identifier.otherAll Open Access, Green3
dc.identifier.otherhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85076607695&doi=10.1063%2f1.5134290&partnerID=40&md5=96122314d0f6370319e931ec40028261
dc.identifier.otherhttps://elar.urfu.ru/bitstream/10995/98816/1/978-5-8295-0640-7_2019_622.pdfm
dc.identifier.urihttp://hdl.handle.net/10995/101628-
dc.description.abstractThe activity particle size distribution is an important factor governing if the aerosols can be deposited at various respiratory tract regions in human. Radon decay products are the second cause of lung cancer after smoking. A lot of dosimetric models have been built in to calculate the effective dose and effective depth dose in different region and tissues of human respiratory system. The deposition fraction estimation is the first step of dose calculation. Therefore, the dependence of radioactive aerosols deposition fraction in human respiratory system on their size should be studied. In this work, the activity size distributions of 222Rn decay products (218Po, 214Pb and 214Bi,) are measured in indoor air. Only unattached fraction of 218Po (active median thermodynamic diameter AMTD∼1-1.5 nm) was measured with developed diffusion battery. Nearly 85% of 218Po activity is free with its short half-life time. Most of the measured attached activities of (214Pb and 214Bi) are associated with the aerosol particles of the accumulation mode (0.2 μm to 2 μm). The activity distribution of the two radionuclides is typically identical. The active median aerodynamic diameter (AMAD) is 0.42 μm with a geometric standard deviation (GSD) of 3.4. Given that dose estimation is sensitive to environmental conditions and based on the obtained experimental results, the local energy deposition of (214Pb and 214Bi) by adult male for various levels of physical exertion (sleeping, sitting, light exercise and Heavy exercise) is computed with LUDEP program. For unattached particles (1-5 nm) nearly 98% are deposited unlike accumulated fraction (0.42 μm in our case) not more 30 % is deposited in the respiratory system. © 2019 Author(s).en
dc.format.mimetypeapplication/pdfen
dc.language.isoenen
dc.publisherAmerican Institute of Physics Inc.en
dc.rightsinfo:eu-repo/semantics/openAccessen
dc.sourceAIP Conf. Proc.2
dc.sourceAIP Conference Proceedingsen
dc.titleEffect of activity particle size distribution on deposition fraction of inhaled radon decay products in human respiratory systemen
dc.typeConference Paperen
dc.typeinfo:eu-repo/semantics/conferenceObjecten
dc.typeinfo:eu-repo/semantics/publishedVersionen
dc.identifier.doi10.1063/1.5134290-
dc.identifier.scopus85076607695-
local.contributor.employeeSakr, S., Department of Physics, Minia University, El-Minia, Egypt
local.contributor.employeeMostafa, M.Y.A., Department of Physics, Minia University, El-Minia, Egypt, Ural Federal University, Mira Street 19, Ekaterinburg, 620002, Russian Federation
local.contributor.employeeMohamed, A., Department of Physics, Minia University, El-Minia, Egypt
local.contributor.employeeMoustafa, M., Department of Physics, Minia University, El-Minia, Egypt
local.contributor.employeeAhmed, A.A., Department of Physics, Minia University, El-Minia, Egypt
local.volume2174-
local.contributor.departmentDepartment of Physics, Minia University, El-Minia, Egypt
local.contributor.departmentUral Federal University, Mira Street 19, Ekaterinburg, 620002, Russian Federation
local.identifier.pure11757033-
local.identifier.pure2934ef3c-c6a0-4d7e-9330-04f946c51f1cuuid
local.description.order020139-
local.identifier.eid2-s2.0-85076607695-
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