Radiation-induced effects in soda-lime silicate glasses of different origin

Abstract

2001) Radiation-induced effects in soda-lime silicate glasses of different origin, Radiation Effects and Defects in Solids, 156:1-4, 353-358,Correlated measurements of optical absorption and thermoluminescence of g-irradiated sodalime silicate (SLS) glasses were performed to detect and characterize the induced radiation damage in these materials. Three kinds of hole-type defect centers have been distinguished in glasses which differ with respect to the content of the glass-network modifiers and some multivalent transient metal cations. The main features of the related absorption bands are compared and discussed in terms of the purity and pre-irradiation histoty of samples.

Thermoluminescence of silica-based materials irradiated by thermal neutrons

“…The main observation in their study is the diffusion of alkali metals (Na and K) from soda-lime glass substrates into thin films of some metal oxides, which results in a less TL signal and a peak shift to higher temperature. Other TL and optical absorption measurements on glasses materials were also reported by Suszynska et al [9]. They observed broad glow peaks at around 473 K, which is similar to these obtained in the present materials.…”

“…A further increase in Na + and a decrease in Si 4+ concentrations could result in 473 K peak intensity quenching and enhancing the intensity of the peak at 643 K. This means that the access of Na + ions have acted as quenchers for the hole centres 'AlO 4 ' and enhanced the induced NBO, which are the defects responsible for the peak at 643 K (figures 4-6). Suszynska et al [9] have tried to correlate the optical absorption measurements and TL peaks in soda lime glasses. They found that Na-type glass (which could be identified by its brownish/greyish colour) has shown absorption maxima located at 624 and 419 nm and both bands are corresponding to the same type of defects, which are in agreement with the three peaks observed in TL (the strongest one is at around 473 K) of all samples although with different efficiencies.…”

“…These defects are related to NBO introduced by alkali ions and additionally by irradiation. This in contrast to parent defects in the SiOz matrix where the described defect centres are of hole-nature and are located near the NBO ions, which in turn are located at different sites depending on the type of alkali introduced [9]. Another group has tried to correlate the observed luminescence and ESR signals of ion-irradiated silica glass [21].…”

“…The phenomenon of TL is also found in quartz and silica glasses. A number of workers have reported on the existence of TL and the associated mechanism in these materials [3][4][5][6][7][8][9][10][11][12][13]. From the application point of few, there are several advantages in using glass materials in dosimetry of ionizing radiations.…”

Nanosecond Near-Infrared Laser Discoloration of Gamma Irradiated Silicate Glasses

“…In Eq. 10, τ 0 is the pre-exponential factor (typically ~13µs), k B is the Boltzmann's constant and E a the activation energy of the decay (~1 eV for silicate glasses [5,[7][8][9][10][11][12]).…”