NASA LogoNTRSNTRS - NASA Technical Reports ServerSearchmore_vertCollectionsAboutNewsHelpLogin Back to ResultsInvestigation of Deuterium Loaded Materials Subject to X-Ray ExposureResults are presented from an exploratory study involving x-ray irradiation of select deuterated materials. Titanium deuteride plus deuterated polyethylene, deuterated polyethylene alone, and for control, hydrogen-based polyethylene samples and nondeuterated titanium samples were exposed to x-ray irradiation. These samples were exposed to various energy levels from 65 to 280 kV with prescribed electron flux from 500 to 9000 μA impinging on a tungsten braking target, with total exposure times ranging from 55 to 280 min. Gamma activity was measured using a high-purity germanium (HPGe) detector, and for all samples no gamma activity above background was detected. Alpha and beta activities were measured using a gas proportional counter, and for select samples beta activity was measured with a liquid scintillator spectrometer. The majority of the deuterated materials subjected to the microfocus x-ray irradiation exhibited postexposure beta activity above background and several showed short-lived alpha activity. The HPE and nondeuterated titanium control samples exposed to the x-ray irradiation showed no postexposure alpha or beta activities above background. Several of the samples (SL10A, SL16, SL17A) showed beta activity above background with a greater than 4σ confidence level, months after exposure. Portions of SL10A, SL16, and SL17A samples were also scanned using a beta scintillator and found to have beta activity in the tritium energy band, continuing without noticeable decay for over 12 months. Beta scintillation investigation of as-received materials (before x-ray exposure) showed no beta activity in the tritium energy band, indicating the beta emitters were not in the starting materials.Document ID20170002544Acquisition SourceGlenn Research CenterDocument TypeTechnical Memorandum (TM)AuthorsBenyo, Theresa L.*(NASA Glenn Research Center Cleveland, OH United States)*Steinetz, Bruce M.*(NASA Glenn Research Center Cleveland, OH United States)*Hendricks, Robert C.*(NASA Glenn Research Center Cleveland, OH United States)*Martin, Richard E.*(Cleveland State Univ. Cleveland, OH, United States)*Forsley, Lawrence P.*(JWK International Co. Annandale, VA, United States)*Daniels, Christopher C.*(Akron Univ. Akron, OH, United States)*Chait, Arnon*(NASA Glenn Research Center Cleveland, OH United States)*Pines, Vladimir*(Pinesci Consulting Avon Lake, OH, United States)*Pines, Marianna*(Pinesci Consulting Avon Lake, OH, United States)*Penney, Nicholas*(Ohio Aerospace Inst. Brook Park, OH, United States)*Kamm, Tracy R.*(Vantage Partners, LLC Cleveland, OH, United States)*Becks, Michael D.*(Vantage Partners, LLC Cleveland, OH, United States)*Date AcquiredMarch 27, 2017Publication DateFebruary 1, 2017Subject CategoryNuclear PhysicsReport/Patent NumberE-19039GRC-E-DAA-TN31041NASA/TM-2015-218491/REV1Funding Number(s)WBS: WBS 161682.04.01.01.30CONTRACT_GRANT: NNC13BA10BDistribution LimitsPublicCopyrightPublic Use Permitted.Keywordsx-ray irradiationpolyethylenesdeuteridesAvailable DownloadsNameType20170002544.pdfSTIcloud_downloadcontent_copyvisibilityRelated RecordsThere are no records associated with this record.visibility_offNo Preview Available
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