Optical spectroscopy assessment of the impact of γ-ray irradiation on Gd3+-doped phosphate glass
The effects of γ-ray irradiation (10, 100 kGy) on Gd3+-doped phosphate glass were evaluated. Glass irradiated at 100 kGy was characterized alongside the pristine by differential scanning calorimetry, Fourier transform-infrared spectroscopy and Raman scattering, wherein a lack of alteration in therma...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-06-01
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| Series: | Chemical Physics Impact |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667022423000385 |
| _version_ | 1797801002373480448 |
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| author | José A. Jiménez Charles L. Crawford |
| author_facet | José A. Jiménez Charles L. Crawford |
| author_sort | José A. Jiménez |
| collection | DOAJ |
| description | The effects of γ-ray irradiation (10, 100 kGy) on Gd3+-doped phosphate glass were evaluated. Glass irradiated at 100 kGy was characterized alongside the pristine by differential scanning calorimetry, Fourier transform-infrared spectroscopy and Raman scattering, wherein a lack of alteration in thermal and structural properties was supported. Yet, absorption bands developed around 500 nm with γ-ray dose indicating phosphorus oxygen hole center defects. Optical band gap and Urbach energies exhibited decreasing and increasing trends, respectively, reflecting the influence of trapped electrons and increased disorder/defects. By exciting γ-irradiated samples at 265 nm, blue radio-photoluminescence was observed where intensity increased with dose. Decay curves measured monitoring 415 nm emission showed first-order kinetics suggested to arise from phosphorus electron centers. Emission from Gd3+ was quenched with gamma-ray dose while the 6P7/2 emitting state lifetimes decreased. Correlations between Gd3+ emission intensities and lifetimes with optical band gaps suggest electron center defects perform as ‘energy sinks’. |
| first_indexed | 2024-03-13T04:43:48Z |
| format | Article |
| id | doaj.art-ce6cb3020205405e816eaa0da67a8c2a |
| institution | Directory Open Access Journal |
| issn | 2667-0224 |
| language | English |
| last_indexed | 2024-03-13T04:43:48Z |
| publishDate | 2023-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Chemical Physics Impact |
| spelling | doaj.art-ce6cb3020205405e816eaa0da67a8c2a2023-06-19T04:30:15ZengElsevierChemical Physics Impact2667-02242023-06-016100198Optical spectroscopy assessment of the impact of γ-ray irradiation on Gd3+-doped phosphate glassJosé A. Jiménez0Charles L. Crawford1Department of Chemistry & Biochemistry, Georgia Southern University, Statesboro, GA 30460, United States of America; Corresponding author.Savannah River National Laboratory (SRNL), Aiken, SC 29808, United States of AmericaThe effects of γ-ray irradiation (10, 100 kGy) on Gd3+-doped phosphate glass were evaluated. Glass irradiated at 100 kGy was characterized alongside the pristine by differential scanning calorimetry, Fourier transform-infrared spectroscopy and Raman scattering, wherein a lack of alteration in thermal and structural properties was supported. Yet, absorption bands developed around 500 nm with γ-ray dose indicating phosphorus oxygen hole center defects. Optical band gap and Urbach energies exhibited decreasing and increasing trends, respectively, reflecting the influence of trapped electrons and increased disorder/defects. By exciting γ-irradiated samples at 265 nm, blue radio-photoluminescence was observed where intensity increased with dose. Decay curves measured monitoring 415 nm emission showed first-order kinetics suggested to arise from phosphorus electron centers. Emission from Gd3+ was quenched with gamma-ray dose while the 6P7/2 emitting state lifetimes decreased. Correlations between Gd3+ emission intensities and lifetimes with optical band gaps suggest electron center defects perform as ‘energy sinks’.http://www.sciencedirect.com/science/article/pii/S2667022423000385DosimetryPhosphate glassesGamma raysPhotoluminescence spectroscopyRare earths |
| spellingShingle | José A. Jiménez Charles L. Crawford Optical spectroscopy assessment of the impact of γ-ray irradiation on Gd3+-doped phosphate glass Chemical Physics Impact Dosimetry Phosphate glasses Gamma rays Photoluminescence spectroscopy Rare earths |
| title | Optical spectroscopy assessment of the impact of γ-ray irradiation on Gd3+-doped phosphate glass |
| title_full | Optical spectroscopy assessment of the impact of γ-ray irradiation on Gd3+-doped phosphate glass |
| title_fullStr | Optical spectroscopy assessment of the impact of γ-ray irradiation on Gd3+-doped phosphate glass |
| title_full_unstemmed | Optical spectroscopy assessment of the impact of γ-ray irradiation on Gd3+-doped phosphate glass |
| title_short | Optical spectroscopy assessment of the impact of γ-ray irradiation on Gd3+-doped phosphate glass |
| title_sort | optical spectroscopy assessment of the impact of γ ray irradiation on gd3 doped phosphate glass |
| topic | Dosimetry Phosphate glasses Gamma rays Photoluminescence spectroscopy Rare earths |
| url | http://www.sciencedirect.com/science/article/pii/S2667022423000385 |
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