Preparation And Luminescence Properties Of Ce³⁺/Tb³⁺ Doped Gadolinium Borosilicate Scintillating Glass

In this paper,borosilicate was selected as the glass matrix,Ce³⁺and Tb³⁺ions were used as luminescent ions,and a large amount of Gd2O3 was added to improve the luminescent intensity of Ce³⁺and Tb³⁺ions,also increase the density of glass.In addition,Al2O3,P2O5,BaO are introduced to improve the performance of glass,and the glass system of ABS-BGP?Al₂O₃-B₂O₃-SiO₂-BaO-Gd₂O₃-P₂O₅?is formed.Four groups of ABS-BGP glass samples with different concentrations were prepared by high temperature melting method.Firstly,the concentration of Tb³⁺was kept constant by changing the introduction amount of Gd₂O₃.It was found that when the Gd³⁺ion concentration was 20 mol%,the best luminous intensity was obtained in the glass samples doped with Tb³⁺ions;Then,in the Tb³⁺doped glass sample,only the amount of Tb₂O₃introduced was changed.It was found that under the excitation of ultraviolet light,pulsed electron beam and X-ray,when the concentration of Tb³⁺ion was 10 mol%,the luminescent intensity was the best.Moreover,the integrated scintillation efficiency of BGO crystal under X-ray excitation is 63.9%.Then,only the amount of Ce2O3 introduced was changed in the sample of Ce³⁺doped glass.When the concentration of Ce₂O₃ was 0.3 mol%,the intensity of Ce³⁺ion luminescence was the highest,and the decay time of the sample reached the nanosecond level.Finally,the luminescence of Ce³⁺/Tb³⁺co-doped glass samples was studied using nanosecond time-resolved pulsed electron beam.It was found that the energy transfer efficiency of the series samples was around 25%,which was independent of the concentration of Ce³⁺ions.Under the excitation of pulsed electron beam,the decay time of Tb³⁺at 542 nm is 2.2 ms,and that of Ce³⁺at 386 nm is 35 ns,540ns.X-ray luminescence spectra and cathodo luminescence spectra showed that the sample had good scintillation performance,which provided the key material preparation basis and theoretical basis for promoting the substantive application of gadolinium borosilicate scintillating glass.