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Thermoluminescence characterization of Ag, Sm3+ co-doped Li2B4O7 glass phosphors
A Di Rocco1, E Cruz-Zaragoza2, E Camarillo-García3
1Instituto de Física Arroyo Seco (UNCPBA) and CIFICEN (UNCPBA-CICPBA-CONICET), Pinto 399, Tandil, Buenos Aires, 7000, Argentina; Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Facultad de Ciencias Exactas, Pinto 399, Tandil, Buenos Aires, 7000, Argentina.
Abstract:
Undoped, silver (Ag) and samarium (Sm) doped, and Ag-Sm co-doped Li2B4O7 glassy systems were synthesized using the solid-state method, and a comprehensive structural, optical, and thermoluminescence (TL) characterization was carried out. The highest TL intensity was found in the co-doped Li2B4O7:1% Ag:2% Sm composition, which exhibits a significant enhancement in TL performance with an increase of approximately 200% in peak intensity compared to the undoped matrix. The material also demonstrates a highly linear dose response relationship (R ≈ 1) over the 1-500 Gy range, along with excellent repeatability (<1% variation), thereby fulfilling key criteria for reliable dosimetry applications. These results provide clear experimental evidence that Ag-Sm3+ co-doping is an effective strategy for enhancing the TL efficiency of Li2B4O7 under beta irradiation. Consequently, this material emerges as a promising candidate for radiation dosimetry, underscoring the critical role of multi-dopant synergy in optimizing luminescent detectors systems.
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