Synthesis and luminescence properties of Tb doped LaBGeO and GdBGeO glass scintillators.

Borogermanate glasses show promise as scintillators due to their ability to incorporate high levels of heavy metal oxides without excessive loss of luminescent output intensity. Heavy metal oxide scintillating glasses of 50GeO-25BO-(25-x)LaO/GdO-xTbO (x=1,2,3,4) with the same stoichiometric composition of crystalline Tb doped LaBGeO/GdBGeO were synthesized via the melt-quench method. Three times of higher light output under gamma ray excitation was observed from Tb doped GdBGeO based glass compared to LaBGeO glass due to efficient energy transfer between Gd-Tb pairs and higher luminescence efficiency in the GdBGeO glasses.

Synthesis and characterization of a BaGdF5:Tb glass ceramic as a nanocomposite scintillator for x-ray imaging.

Transparent glass ceramics with embedded light-emitting nanocrystals show great potential as low-cost nanocomposite scintillators in comparison to single crystal and transparent ceramic scintillators. In this study, cubic structure BaGdF5:Tb nanocrystals embedded in an aluminosilicate glass matrix are reported for potential high performance MeV imaging applications. Scintillator samples with systematically varied compositions were prepared by a simple conventional melt-quenching method followed by annealing.

Effects of age, parity, and pregnancy abnormalities on foal birth weight and uterine blood flow in the mare.

Color Doppler sonography has become routine for the evaluation of high-risk pregnancies in human medicine. Previous studies documenting uterine blood flow parameters in the pregnant mare have found a decrease in peripheral blood flow resistance in the first pregnancy weeks and an increase in uterine blood flow, especially in the last trimester of pregnancy. However, these studies involved only a small number of mares.