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Improvements in the dosimetric models of selected benthic organisms

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dc.contributor.advisor Higley, Kathryn A.
dc.creator Caffrey, Emily Amanda
dc.date.accessioned 2012-10-10T17:15:50Z
dc.date.available 2012-10-10T17:15:50Z
dc.date.copyright 2012-10-02
dc.date.issued 2012-10-02
dc.identifier.uri http://hdl.handle.net/1957/34305
dc.description Graduation date: 2013 en_US
dc.description.abstract The International Commission on Radiological Protection (ICRP) has modeled twelve reference animal and plant (RAP) species using simple geometric shapes in Monte–Carlo (MCNP) based simulations. The focus has now shifted to creating voxel phantoms of each RAP to advance the understanding of radiation interactions in nonhuman biota. The work contained herein presents results for the voxel phantom of the Dungeness crab, Metacarcinus magister, the Sand Dab, Limanda limanda, and the brown seaweed, Fucus vesiculosus, and details a generalized framework for creating voxel phantoms of the other RAPs. Absorbed fractions (AFs) for all identified organs were calculated at several discrete initial energies: 0.01, 0.015, 0.02, 0.03, 0.05, 0.1, 0.2, 0.5, 1.0, 1.5, 2.0, and 4.0 MeV for photons and 0.1, 0.2, 0.4, 0.5, 0.7, 1.0, 1.5, 2.0 and 4.0 MeV for electrons. AFs were then tabulated for each organ as a source and target at each energy listed above. AFs whose error exceeded 5% are marked with an underline in the data tables; AFs whose error was higher than 10% are shown in the tabulated data as a dashed line. The AF’s were highly dependent on organ mass and geometry. For photons above 0.5 MeV and electrons above 0.2-0.4 MeV a nontrivial amount of energy escapes the source organ. en_US
dc.language.iso en_US en_US
dc.subject Radioecology en_US
dc.subject.lcsh Marine radioecology en_US
dc.subject.lcsh Dungeness crab -- Effect of radioactive pollution on en_US
dc.subject.lcsh Limanda -- Effect of radioactive pollution on en_US
dc.subject.lcsh Fucus vesiculosus -- Effect of radioactive pollution on en_US
dc.subject.lcsh Radiation dosimetry en_US
dc.subject.lcsh Radioactive pollution -- Environmental aspects en_US
dc.title Improvements in the dosimetric models of selected benthic organisms en_US
dc.type Thesis/Dissertation en_US
dc.degree.name Master of Science (M.S.) in Radiation Health Physics en_US
dc.degree.level Master's en_US
dc.degree.discipline Engineering en_US
dc.degree.grantor Oregon State University en_US
dc.contributor.committeemember Palmer, Camille
dc.contributor.committeemember Emerson, Sarah
dc.contributor.committeemember Herlihy, Alan
dc.description.peerreview no en_us


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