Luminescence properties of Eu2+ doped SrB4O7 phosphor for radiation dosimetry

• Report TL/OSL properties of SrB4O7:Eu2+ under beta irradiations.
• OSL Sensitivity was about 33% than that of commercially available α-Al2O3.
• TL glow peaks was appear at 305° C and TL sensitivity about 200 times higher than TLD-500.
• OSL decay pattern was faster than α- Al2O3:C and dose response was linear nature.

In this report, we presented the TL/OSL properties of Eu doped SrB4O7 phosphor under β-irradiation. This phosphor was synthesized by using solid state method. The phosphor shows OSL sensitivity about 33% than that of commercially available α-Al2O3: C phosphor. CW-OSL curve possess two components having photoionization cross-sections 0.707 × 10−17 and 18.58 × 10−17 cm2 respectively and TL sensitivity about 200 times higher than TLD-500. The kinetic parameters such as activation energy, frequency factor and order of kinetics of TL curve were calculated by using peak shape method. In TL/OSL mode dose-response was almost linear in the range of measurements. The MDD was found to be 1.26 mGy with 3σ of background. Also reusability studies showed the phosphor can be reused for 10 cycles with 1% change in the OSL output. The PL spectra of SrB4O7 showed emission in NUV region when excited with 318 nm under UV source.

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