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035 a| (OCoLC)1456021932;

043 a| n-us-nc;

090 a| QC475;

049 a| EREE;

100 1 a| Snedeker, Marcus,e| author.?| UNAUTHORIZED;

245 10 a| Modeling the impact of container material and geometry on the uniformity of dose in irradiation calibration /c| by Marcus Snedeker.;

264 1 a| [Greenville, N.C.] :b| [East Carolina University],c| 2024.;

300 a| 1 online resources (49 pages) :b| illustrations (chiefly color);

336 a| textb| txt2| rdacontent;

337 a| computerb| c2| rdamedia;

338 a| online resourceb| cr2| rdacarrier;

347 a| text fileb| application/pdfc| 1.75 MB2| rda;

538 a| System requirements: Adobe Reader.;

538 a| Mode of access: World Wide Web.;

502 b| M.S.c| East Carolina Universityd| 2024.;

500 a| Presented to the Faculty of the Department of Physics;

500 a| Advisor: Regina DeWitt;

500 a| Title from PDF t.p. (viewed January 5, 2026).;

520 3 a| In order to calibrate radiation sources in instruments used by the Optically Stimulated Luminescence Laboratory at ECU, samples are sent in containers to an external gamma source to be irradiated with a known radiation dose. The type of material used for the container can have an effect on the uniformity of dose absorbed by the sample, which can introduce unforeseen sources of error in the calibration. In this study, simulations were performed using DosiVox (via Geant4) to approximate the dose absorbed throughout different sample-container setups. The goal is to quantify dose uniformity and determine which container materials may be used, while still maintaining feasible levels of uniformity. It was ascertained that the container materials which best maintain uniformity for ceramic samples are aluminum, silica, and ceramic. It was also ascertained that the container materials which best maintain uniformity for silica samples are borosilicate glass, silica, and ceramic. Teflon was found to be the container material that maintained uniformity the least for both sample types.;

504 a| Includes bibliographical references.;

650 0 a| Radiationx| Instrumentsx| Calibration.=| ^A11388;

650 0 a| Irradiation.=| ^A53627;

650 0 a| Polytef.=| ^A436763;

650 0 a| Radiation dosimetry.=| ^A10185;

610 20 a| East Carolina University.=| ^A637090;

650 7 a| irradiation (physicochemical process)2| aat0| (CStmoGRI)aat300224196;

650 7 a| dosimetry.2| aat0| (CStmoGRI)aat300214747;

653 a| physics;

653 a| dosivox;

653 a| geant4;

653 a| simulation;

653 a| modeling;

700 1 a| DeWitt, Regina,e| degree supervisor.?| UNAUTHORIZED;

710 2 a| East Carolina University.b| Department of Physics.?| UNAUTHORIZED;

856 40 z| Access via ScholarShipu| http://hdl.handle.net/10342/13685;

994 a| C0b| ERE;

596 a| 1 4;

998 a| 6477462;

999 a| CLICK ON WEB ADDRESSw| ASISc| 1i| 6477462-1001l| JNETm| JOYNERr| Ys| Yt| JNE3ETDu| 9/16/2024x| ETDz| JERESOURCE;

999 a| CLICK ON WEB ADDRESSw| ASISc| 1i| 6477462-2001l| HSLELECm| HSLr| Ys| Yt| HEETDu| 9/16/2024x| ETDz| HERESOURCE;

Modeling the impact of container material and geometry on the uniformity of dose in irradiation calibration / by Marcus Snedeker.

Author/creator	Snedeker, Marcus author.
Other author	DeWitt, Regina, degree supervisor.
Other author	East Carolina University. Department of Physics.
Format	Theses and dissertations
Publication	[Greenville, N.C.] : [East Carolina University], 2024.
Description	1 online resources (49 pages) : illustrations (chiefly color)
Supplemental Content	Access via ScholarShip
Subjects	East Carolina University. Radiation--Instruments. --Calibration. Irradiation. Polytef. Radiation dosimetry.

Summary	In order to calibrate radiation sources in instruments used by the Optically Stimulated Luminescence Laboratory at ECU, samples are sent in containers to an external gamma source to be irradiated with a known radiation dose. The type of material used for the container can have an effect on the uniformity of dose absorbed by the sample, which can introduce unforeseen sources of error in the calibration. In this study, simulations were performed using DosiVox (via Geant4) to approximate the dose absorbed throughout different sample-container setups. The goal is to quantify dose uniformity and determine which container materials may be used, while still maintaining feasible levels of uniformity. It was ascertained that the container materials which best maintain uniformity for ceramic samples are aluminum, silica, and ceramic. It was also ascertained that the container materials which best maintain uniformity for silica samples are borosilicate glass, silica, and ceramic. Teflon was found to be the container material that maintained uniformity the least for both sample types.
General note	Presented to the Faculty of the Department of Physics
General note	Advisor: Regina DeWitt
General note	Title from PDF t.p. (viewed January 5, 2026).
Dissertation note	M.S. East Carolina University 2024.
Bibliography note	Includes bibliographical references.
Technical details	System requirements: Adobe Reader.
Technical details	Mode of access: World Wide Web.

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Modeling the impact of container material and geometry on the uniformity of dose in irradiation calibration / by Marcus Snedeker.

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