title: Luminescence properties of Tb(3+)-doped borosilicate scintillating glass under UV excitation.
abstract: Transparent Li₂O-BaO-La₂O₃-Al₂O₃-B₂O₃-SiO₂ glasses doped with Tb(3+) ion were prepared by high temperature melting method. Luminescence properties of Tb(3+)-doped borosilicate glasses have been investigated by transmission, excitation, emission and luminescence decay measurements. The transmission spectrum shows the glass has good transmittance in the visible region. Under the 236 nm UV excitation the intense green emission from (5)D₄ level is observed in Tb(3+)-doped borosilicate glass, comparable in intensity to the violet-blue emission starting from the (5)D₃ level. The green emission intensity of Tb(3+) ion firstly increases and then decreases with the decreasing B₂O₃/SiO₂ ratio in glass matrix. (5)D₄→(7)FJ (J=6, 5, 4 and 3) transitions of Tb(3+) ion in borosilicate glass are greatly enhanced with increasing concentration of Tb(3+) through the cross relaxation [Tb(3+) ((5)D₃)+Tb(3+) ((7)F6)→Tb(3+) ((5)D₄)+Tb(3+) ((7)F₀)] between two Tb(3+) ions. Luminescence decay time of 2.13 ms is obtained for the emission transitions starting from (5)D₄ level in 2.5Li₂O-20BaO-20La₂O₃-2.5Al₂O₃-20B₂O₃-35SiO₂-0.5Tb₄O₇ glass. The results show that Tb(3+)-doped borosilicate glasses would be potential candidates for scintillating material for static X-ray imaging.
authors: College of Chemistry and Chemical Engineering of Hunan University of Arts and Science, Changde 415000, China. Electronic address: zchg200@126.com.
authors: Chenggang
authors: C
authors: Zuo
authors: School of Chemistry and Chemical Engineering of Hunan University of Science and Technology, Xiangtan 411201, China.
authors: Zhihua
authors: Z
authors: Zhou
authors: College of Chemistry and Material of Yulin Normal University, Yulin 537000, China.
authors: Ligang
authors: L
authors: Zhu
authors: College of Chemistry and Chemical Engineering of Hunan University of Arts and Science, Changde 415000, China.
authors: Anguo
authors: A
authors: Xiao
authors: College of Chemistry and Chemical Engineering of Hunan University of Arts and Science, Changde 415000, China.
authors: Yuandao
authors: Y
authors: Chen
authors: College of Chemistry and Chemical Engineering of Hunan University of Arts and Science, Changde 415000, China.
authors: Xiangyang
authors: X
authors: Zhang
authors: College of Chemistry and Chemical Engineering of Hunan University of Arts and Science, Changde 415000, China.
authors: Yongbing
authors: Y
authors: Zhuang
authors: College of Chemistry and Chemical Engineering of Hunan University of Arts and Science, Changde 415000, China.
authors: Xiaoyang
authors: X
authors: Li
authors: College of Fu Rong of Hunan University of Arts and Science, Changde 415000, China.
authors: Qizhi
authors: Q
authors: Ge
keywords: Li(2)O–BaO–La(2)O(3)–Al(2)O(3)–B(2)O(3)–SiO(2) glasses; Luminescence; Luminescence decay; Scintillation; Tb(3+)