Abstract
The manuscript reports the synthesis of Dy3+ incorporated lithium magnesium borate glass by melt quenching technique. FTIR study revealed the presence of both BO3 as well as tetrahedral BO4 units through their characteristic frequencies. Photoluminescence (PL) study of unirradiated samples confirmed the presence of Dy dopant in the ‘+3’ oxidation states from the characteristic emissions at 482, 578, 666 and 716 nm corresponding to 4F9/2 → 6H15/2, 4F9/2 → 6H13/2 and 4F9/2 → 6H11/2, 4F9/2 → 6H9/2 transitions, respectively. Thermal neutron and gamma irradiated PL emission and lifetime characteristics were discussed in details based on the different defect centers. Thermal neutron irradiated TL study showed that the material has a broad and single dosimetry glow peak at about 450 K which showed high fading due to low temperature peak. TL based neutron sensitivity of LMB: Dy3+ was found to be about 37.4 times less than that of standard TLD-100 (LiF: Mg, Ti) powder. The net TL response from about 3 to 83 mSv of neutron dose was found to be linear (Adj. R2 = 0.9994) which is one of the most desirable properties for dosimetry applications. In addition, the TL trap parameters were evaluated using both deconvolution of TL glow curve and peak shape method as suggested by Chen which were found to be matching with each other.
Funding source: BARC, Department of Atomic Energy, India
Acknowledgments
The authors are highly thankful to Dr. A. K Tyagi, Director Chemistry Group for his guidance and motivation for the work throughout. The authors also thank Dr. D. K. Aswal, Director HS&EG, BARC for providing constant motivation and support for the research works. Special thanks to Dr. Kaustava Bhattacharyya, ChD, BARC and Dr. Kishor Gavhane, Research Associate, RSSD for their help during measurements of FTIR and TL neutron sensitivity of the material, respectively. Special thanks to Dr. Shraddha Desai and Dr. Mala Rao, SSPD, BARC for their kind support and help during the thermal neutron irradiation in GT laboratory, Dhruva reactor, Mumbai.
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Research ethics: Not applicable.
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Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Competing interests: The authors state no conflict of interest.
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Research funding: The research is funded by BARC, Department of Atomic Energy, India.
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Data availability: The raw data can be obtained on request from the corresponding author.
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