Structure and composition peculiarities and spectral-luminescent properties of colorless and pink Bi4Ge3O12 scintillation crystals

Peculiar Structural Effects in Pure and Doped Functional Single Crystals of Complex Compositions

“…Colorless optically homogeneous Bi 4 Ge 3 O 12 single crystals both nominally pure (BGO) and doped with Dy 2 O 3 (BGO:Dy) of 16 mm in diameter and 65 mm in length were grown by the Czochralski method [110]. Special growth and weight control PC program AURA at NIKA-3 growth setup was used to obtain optical quality crystals.…”

“…The colored (pink) samples BGO(P) were obtained by additional high-temperature treatment (900-950 • C) of plates of 1.5-2.0 mm in thickness, cut from the colorless boule, in graphite crucibles at a pressure of 10 −2 Torr and using several milligrams of stannous oxalate SnC 2 O 4 as a reducing agent. The annealing time was varied from 6 to 10 h [110].…”

“…The absorption spectra crystals were measured for SrMoO 4 :Tm 3+ at room temperature [95]. The transmission, spectral-luminescence, and excitation spectra were studied for nominally pure Bi 4 Ge 3 O 12 [110], whereas spectral-luminescence and absorption spectra were investigated for BGO:1.0% Dy [120].…”

“…For this family of compounds, the use of structural analysis in combination with X-ray absorption spectroscopy has been successful. As a result, this methodology was successfully applied to another class of compounds with the eulytin structure [110]. group 43 , Z = 4) [152].…”

Influence of the Uniaxial Hot-Pressing Sintering Condition on Bi4Ge3O12 Ceramic Scintillators

“…e BGO crystals growth process is reasonably expensive [6][7][8]. However, the use of polycrystalline ceramics has shown some advantages, in comparison with single crystal form, such as easier preparation and lower production costs [9].…”