Probing electronic environment in gamma irradiated sodium borosilicate glass and simulated waste glass: a perturbed angular correlation spectroscopy study

Time Differential Perturbed Angular Correlation (TDPAC) has been used to investigate the local structural changes (if any) in Sodium borosilicate (NBS) Glass and Simulated Waste Oxide loaded sodium borosilicate glass (SNBS) used for immobilization of high-level liquid waste at Trombay, Mumbai. The g...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2021-05, Vol.328 (2), p.569-576
Main Authors: Kumar, Ashwani, Mishra, R. K., Bhardwaj, Y. K., Kaushik, C. P., Tomar, B. S.
Format: Article
Language:English
Subjects:
Angular correlation
Borosilicate glass
Chemistry
Chemistry and Materials Science
Diagnostic Radiology
Electric fields
Gamma rays
Hadrons
Heavy Ions
Immobilization
Inorganic Chemistry
Interaction parameters
Investigations
Irradiation
Liquid wastes
Nuclear Chemistry
Nuclear energy
Nuclear Physics
Physical Chemistry
Quadrupole interaction
Quadrupoles
Radiation, Background
Skewed distributions
Sodium
Tracers (Biology)
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Summary:Time Differential Perturbed Angular Correlation (TDPAC) has been used to investigate the local structural changes (if any) in Sodium borosilicate (NBS) Glass and Simulated Waste Oxide loaded sodium borosilicate glass (SNBS) used for immobilization of high-level liquid waste at Trombay, Mumbai. The glasses were doped with 181 Hf tracer as TDPAC probe and irradiated with varying dose (1–50 MGy) of gamma radiation using 60 Co (average γ energy 1.25 MeV) source. Hyperfine interaction parameters (quadrupole interaction frequency, its distribution and asymmetry of electric field gradient) were obtained for irradiated NBS and SNBS glasses from fitting of TDPAC data using DPAC software. The data was compared with the corresponding unirradiated glasses. Results do not show any micro-crystallinity upon irradiation in both the NBS and SNBS glass even at the highest gamma dose of 50 MGy even though small changes were observed in quadrupole interaction frequency at doses beyond 30 MGy. This suggests that the sodium borosilicate glass used for immobilization of high-level waste at Trombay is stable towards gamma radiation at least up to a gamma dose of 50 MGy.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-021-07686-z