In this article, we report the detailed spectroscopic studies of high Ercontent (50%) transparent YAG ceramic co-doped with nominal Cr content (0.1 mol %). Various radiative and non-radiative spectroscopic properties such as radiative decay time, fluorescence branching ratio, emission/absorption cross sections, internal radiative quantum yields of the infrared and the upconverted emission bands...

Geometry of the pore space is a fundamental control on flow in carbonates over reservoir exploitation time scales. Fluid properties and pressure gradients are temporally variable and can be changed by use of effective reservoir production, workover, and stimulation procedures. The geometry of the porous medium largely remains constant except if significant pressure variations deform or fracture...