Terbium-activated heavy scintillating glasses

Abstract

Tb-activated scintillating glasses with high Ln2O3 (Ln=Gd, Y, Lu) concentration up to 40mol% have been prepared. The effects of Ln 3+ ions on the density, thermal properties, transmission and luminescence properties under both UV and X-ray excitation have been investigated. The glasses containing Gd2O3 or Lu2O3 exhibit a high density of more than 6.0g/cm 3 . Energy transfer from Gd 3+ to Tb 3+ takes place in Gd-containing glass and as a result the Gd-containing glass shows a light yield 2.5 times higher than the Y-or Lu-containing glass. The Effect of the substitution of fluorine for oxygen on the optical properties was also investigated.

Effect of Tb3+ concentration and sensitization of Ce3+ on luminescence properties of terbium doped phosphate scintillating glass

“…Tb 3+ -doped scintillating glass is attractive material used in many applications such as thermal neutron detection and radiography [1], due to its many advantages like low-cost, manufacturing of large size and drawing for fiber [2][3][4]. However, compared with crystals, the energy transfer towards luminescence center efficiency is rather low in scintillating glass, which results in low light yield [5].…”

“…However, compared with crystals, the energy transfer towards luminescence center efficiency is rather low in scintillating glass, which results in low light yield [5]. So far, many efforts have been devoted to enhance the luminescence intensity of Tb 3+ -doped scintillating glass, such as choosing the matrix glass composition [3,4,6,7], deciding the suitable doping concentration of Tb 3+ ions [8], and conforming the sensitization concentration of Gd 2 O 3 or Ce 2 O 3 [9][10][11]. In addition, glass ceramics were also fabricated to increase the luminescence intensity of Tb 3+ [12,13].…”

Luminescence properties of Tb doped and Tm/Tb/Sm co-doped glasses for LED applications

“…Emission occurs from 5 D 3 (blue) and 5 D 4 (green) levels to the ground state of Tb 3+ . The emission bands peaking at 435 and 413 nm are associated with the 5 D 3 -7 F J (J ¼ 4, 5) electronic transitions, while the emission lines locating at 622, 585, 542, 487 nm are due to 5 D 4 -7 F J (J ¼ 3, 4, 5, 6) electronic transitions of Tb 3+ [8,9]. Besides, the emission band corresponding to the transitions of 5 D 4 -7 F 5 splits into two peaks, which indicate that glass network has the distortion effect on Tb 3+ leading to the Stark split of energy level.…”

Luminescence, energy transfer properties of Tb/Gd3+-coactivated oxyfluoride borogermanate scintillating glasses

“…Rare-earth activated scintillating glasses, owing to the advantages of low-cost, large-volume production as well as easy shaping of elements, have been developed to be one of the most promising candidates for scintillators [1][2][3]. From the viewpoint of application in high-energy physics as well as industrial and medical imaging, the density of scintillating glass is usually required to exceed 5.0 g/cm 3 .…”