{"title":"伽玛辐照K2S2O5单晶的电子自旋共振","authors":"Recep Tapramaz, Fevzi Köksal","doi":"10.1016/1359-0197(92)90140-B","DOIUrl":null,"url":null,"abstract":"<div><p>The electron spin resonance (ESR) spectra of γ-irradiated potassium pyrosulfite single crystals have been investigated between 300 and 103 K temperature interval. The signals were attributed to three SO<sup>-</sup><sub>3</sub> and a SO<sup>-</sup><sub>2</sub> radicals, and found to be temperature dependent. The SO<sup>-</sup><sub>3</sub> radicals were found to be inequivalent. The presence of three SO<sup>-</sup><sub>3</sub> radicals is not consistent with the monoclinic structure of K<sub>2</sub>S<sub>2</sub>O<sub>5</sub> single crystal and this is attributed to any misadjustment of the orientations of SO<sup>-</sup><sub>3</sub> radicals to fit the crystal structure after irradiation. Elements of the <em>g</em> and hyperfine tensors of <sup>33</sup>S nuclei with natural abundance of 0.74% for SO<sup>-</sup><sub>3</sub> and SO<sup>-</sup><sub>2</sub> radicals were determined. For two SO<sup>-</sup><sub>3</sub> radicals, the g and hyperfine values in a plane perpendicular to <em>a</em> axis of the crystal were found to be equal below 193 K, while they are different at room temperature. This reversible effect can be attributed to structural phase transition.</p></div>","PeriodicalId":14262,"journal":{"name":"International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry","volume":"40 1","pages":"Pages 55-57"},"PeriodicalIF":0.0000,"publicationDate":"1992-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/1359-0197(92)90140-B","citationCount":"1","resultStr":"{\"title\":\"Electron spin resonance of gamma-irradiated K2S2O5 single crystals\",\"authors\":\"Recep Tapramaz, Fevzi Köksal\",\"doi\":\"10.1016/1359-0197(92)90140-B\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The electron spin resonance (ESR) spectra of γ-irradiated potassium pyrosulfite single crystals have been investigated between 300 and 103 K temperature interval. The signals were attributed to three SO<sup>-</sup><sub>3</sub> and a SO<sup>-</sup><sub>2</sub> radicals, and found to be temperature dependent. The SO<sup>-</sup><sub>3</sub> radicals were found to be inequivalent. The presence of three SO<sup>-</sup><sub>3</sub> radicals is not consistent with the monoclinic structure of K<sub>2</sub>S<sub>2</sub>O<sub>5</sub> single crystal and this is attributed to any misadjustment of the orientations of SO<sup>-</sup><sub>3</sub> radicals to fit the crystal structure after irradiation. Elements of the <em>g</em> and hyperfine tensors of <sup>33</sup>S nuclei with natural abundance of 0.74% for SO<sup>-</sup><sub>3</sub> and SO<sup>-</sup><sub>2</sub> radicals were determined. For two SO<sup>-</sup><sub>3</sub> radicals, the g and hyperfine values in a plane perpendicular to <em>a</em> axis of the crystal were found to be equal below 193 K, while they are different at room temperature. This reversible effect can be attributed to structural phase transition.</p></div>\",\"PeriodicalId\":14262,\"journal\":{\"name\":\"International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry\",\"volume\":\"40 1\",\"pages\":\"Pages 55-57\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1992-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/1359-0197(92)90140-B\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/135901979290140B\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/135901979290140B","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Electron spin resonance of gamma-irradiated K2S2O5 single crystals
The electron spin resonance (ESR) spectra of γ-irradiated potassium pyrosulfite single crystals have been investigated between 300 and 103 K temperature interval. The signals were attributed to three SO-3 and a SO-2 radicals, and found to be temperature dependent. The SO-3 radicals were found to be inequivalent. The presence of three SO-3 radicals is not consistent with the monoclinic structure of K2S2O5 single crystal and this is attributed to any misadjustment of the orientations of SO-3 radicals to fit the crystal structure after irradiation. Elements of the g and hyperfine tensors of 33S nuclei with natural abundance of 0.74% for SO-3 and SO-2 radicals were determined. For two SO-3 radicals, the g and hyperfine values in a plane perpendicular to a axis of the crystal were found to be equal below 193 K, while they are different at room temperature. This reversible effect can be attributed to structural phase transition.
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