Gamma-ray absorbing characteristic of obsidian rocks as a potential material for radiation protection

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dc.authoriduzun duran, selcen/0000-0003-4943-4654
dc.contributor.authorDuran, Selcen Uzun
dc.contributor.authorKucukomeroglu, Belgin
dc.contributor.authorCiris, Ali
dc.contributor.authorErsoy, Hakan
dc.date.accessioned2024-11-07T13:32:16Z
dc.date.available2024-11-07T13:32:16Z
dc.date.issued2022
dc.departmentNiğde Ömer Halisdemir Üniversitesi
dc.description.abstractIn this study, natural radionuclide levels and mass absorption coefficients of obsidian samples were examined to determine their gamma radiation properties. Fourteen obsidian samples were collected from 7 different locations in Rize province, Ikizdere region, Turkey. X-ray fluorescence measurements of the samples revealed the silica structure and comparable elemental structure with slight differences in atomic ratios. Radionuclide analysis showed that the Cs-137 activity was below the detection limit, and the mean activities of U-238, Th-232 and K-40 were 93 +/- 9, 67 +/- 7, 1027 +/- 19 Bq.kg(-1), respectively. The average experimental mass absorption coefficients at 81.0 keV, 302.9 keV, 356.0 keV and 661.7 keV were found to be 0.216, 0.108, 0.098 and 0.080 cm(2) g(-1), respectively. In the <100 keV region which the photoelectric effect is dominant, differences among the absorption coefficients were more pronounced, while it was relatively much smaller in the intermediate energy region. Also, it was seen that the absorption coefficients of the samples were higher than many materials, especially in the low energy region. The average half-value thicknesses showed that obsidian between 1.43 cm and 3.84 cm depending on the photon energy should be used to halve the radiation intensity. In addition, it was determined that the thicknesses in the range of 4.75 cm-12.76 cm were sufficient to reduce the intensity to one tenth. Considering all the analysis results, it can be said that obsidian is a potential material in radiation protection and its absorption properties can be improved by processes such as elemental doping.
dc.identifier.doi10.1016/j.radphyschem.2022.110309
dc.identifier.issn0969-806X
dc.identifier.issn1879-0895
dc.identifier.scopus2-s2.0-85132354311
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1016/j.radphyschem.2022.110309
dc.identifier.urihttps://hdl.handle.net/11480/15328
dc.identifier.volume199
dc.identifier.wosWOS:000833539800007
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofRadiation Physics and Chemistry
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241106
dc.subjectMass absorption coefficient
dc.subjectIkizdere obsidian
dc.subjectNatural radioactivity
dc.subjectEffective dose
dc.subjectHalf-value thickness
dc.subjectRadiation shielding
dc.titleGamma-ray absorbing characteristic of obsidian rocks as a potential material for radiation protection
dc.typeArticle

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