Photoluminescence and thermoluminescence in Dy3+‐, Ce3+‐, and Tb3+‐activated MgB4O7 phosphor for dosimetry application

Abha Oza; Vibha Ojha; Shrikrishna Dhale; Sanjay Dhoble

doi:10.1002/bio.4332

journal article Jul 25, 2022

Photoluminescence and thermoluminescence in Dy3+‐, Ce3+‐, and Tb3+‐activated MgB4O7 phosphor for dosimetry application

Abha Oza Vibha Ojha Shrikrishna Dhale Sanjay Dhoble

Luminescence Vol. 37 No. 9 pp. 1563-1574 · Wiley

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Abstract

AbstractSamples of microcrystalline rare earth‐doped magnesium borate materials were synthesized via modified solid‐state diffusion and were characterized using X‐ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. Photoluminescence (PL) results for the MgB4O7:Dy sample depicts blue emission that resulted from a 4F9/2–6H15/2 transition that peaked at 484 nm, which was much stronger than the yellow emission arising due to the 4F9/2–6H13/2 transition at 576 nm. From the emission spectra for MgB4O7:Tb, it seems that at higher concentrations of Tb3+ ion, the green emission becomes strong and directly relates to the energy transfer from the 5D3 excited state to the 5D4 excited state through a cross‐relaxation, whereas the blue emission is suppressed in MgB4O7 phosphors. The thermoluminescence (TL) of the samples was measured immediately after irradiation and compared by TL curve with CaSO4:Dy. MgB4O7:Dy showed very good TL sensitivity for the desirable dosimetric curve at ~218°C and the best glow curve structure. In comparison with the dosimetric peaks for MgB4O7:Ce and MgB4O7:Tb, the MgB4O7:Dy phosphor is equally sensitive to CaSO4:Dy. MgB4O7:Dy and MgB4O7:Tb showed linearity for a 1–5 kGy dose. The activation energies and frequency factors were also calculated for samples MgB4O7:RE (where RE = Dy, Tb, Ce) using the peak shape method.

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Details

Published: Jul 25, 2022
Vol/Issue: 37(9)
Pages: 1563-1574
License: View

Authors

A

Abha Oza

Priyadarshani College of Engineering Nagpur India

V

Vibha Ojha

Priyadarshani College of Engineering Nagpur India

S

Shrikrishna Dhale

Priyadarshani College of Engineering Nagpur India

S

Sanjay Dhoble

Department of Physics R.T.M. Nagpur University Nagpur India

Cite This Article

Abha Oza, Vibha Ojha, Shrikrishna Dhale, et al. (2022). Photoluminescence and thermoluminescence in Dy3+‐, Ce3+‐, and Tb3+‐activated MgB4O7 phosphor for dosimetry application. Luminescence, 37(9), 1563-1574. https://doi.org/10.1002/bio.4332

Photoluminescence and thermoluminescence in Dy3+‐, Ce3+‐, and Tb3+‐activated MgB4O7 phosphor for dosimetry application

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