Behaviour and effect of iron in X-ray irradiated silicate glass

Redox kinetics of iron in alkali silicate glasses exposed to ionizing beams: Examples with the electron microprobe

“…A recent study [32] tends to show that the Fe 3+ to Fe 2+ reduction is accompanied with the formation of NBOHCs in soda-lime silicate glasses: More NBOHCs were created upon X-ray irradiation in soda-lime silicate glasses doped with 0.01 to 0.07 wt.% Fe 2 O 3t than in the undoped glasses. Increased defects density as Fe 3+ is reduced to Fe 2+ at low Fe 2 O 3t content was also observed for X-ray irradiated silicate glasses [29]. Fig.…”

“…The changes in the oxidation states of iron upon ionizing radiations have been the subject of many studies, e.g. [26,[29][30][31][32]. It can be drawn from the latter studies the general conclusions that Fe 3+ as an impurity or as a dopant experiences an irradiation-induced reduction to Fe 2+ by trapping an electron: Fe 3+ + e − → Fe 2+ , which can be rewritten:…”

“…As its content increases, Fe can be less and less considered as a foreign component in the glass network and it looses its character of electron trap. For instance, the Fe 3+ reduction is no longer observed at the level of~1 wt.% of Fe 2 O 3t added in the X-ray irradiated glasses [29].…”

Gamma Radiation‐Induced Changes in Trombay Nuclear Waste Glass Containing Iron

“…Weeks and Bray had reported the EPR spectra of gamma‐irradiated phosphate glasses in 1968 and discussed the formation of oxygen vacancies in them . Radiation damage in silicate glasses by X‐ray irradiation has been studied by Kordas and Camara et al . Gamma radiation‐induced paramagnetic species in fluoride glasses at room temperature and liquid nitrogen temperature has been studied by Bogomolova et al .…”

Spectroscopic investigation of gamma radiation-induced coloration in silicate glass for nuclear applications

“…Griscom [7] has been conducting a longitudinal EPR analysis of irradiated glass materials. Another research study concerning radiation damage induced by X-ray irradiation has been conducted by Camara et al [8,9]. Bogomolova et al [10] have also studied gamma radiation-induced paramagnetic species in fluoride glass materials at room temperature and liquid-nitrogen temperature.…”