| NUKLEONIKA 2013, 58(1):241-244
POROSITY STRUCTURE IN PHOTON ACTIVE GLASSESBożena Jasińska1, Monika Śniegocka1, Renata Reisfeld2, Elena Zigansky2 1 Maria Curie-Skłodowska University, Institute of Physics, 1 M. Curie-Skłodowskiej Sq., 20-031 Lublin, Poland 2 The Hebrew University of Jerusalem, 91904 Jerusalem, Israel Two kinds of photon active glasses were investigated using positron annihilation lifetime spectroscopy (PALS). Both kinds of glasses were prepared using a sol-gel technique, doped by complex of ruthenium tris bipyridyl chloride. Glasses differed from the initial matrix: the first one was prepared using silicon oxide while the second one – zircon oxide. The ortho-positronium (o-Ps) lifetime and intensities were determined from lifetime spectra. Different porosity structure concluded from PALS measurements was found in both cases. In the silica based glasses small free volumes (angstrom size) and pores (from 1 to 10 nm) existed in the material. On the contrary, in zirconia based glasses small intermolecular voids were produced in the structure only, independently of the way of material preparation. Close X |