Absorption spectra of gamma-irradiation TM-doped cabal glasses

Interaction of gamma rays with some sodium phosphate glasses containing cobalt

“…Many authors [21][22][23][24] have also attributed to the occurrence of those charge transfer ultraviolet bands to the presence of unavoidable trace iron impurities within the raw materials used for glass preparation even if present in the ppm level. Recently, ElBatal and other colleagues have confirmed the previous assumption that the UV absorption spectra usually observed in commercial glasses and in several undoped soda lime phosphate [8], bioglass [25], cabal [26], and lithium diborate [27] glasses originate from trace iron impurities. The broadness of these UV bands is attributed to the possible presence of more than one site for both Fe 3+ and Fe 2+ ions [7,28,29].…”

Shielding behavior of V2O5 doped lead borate glasses towards gamma irradiation

“…Recently, ElBatal et al [15][16][17][18][19][20][40][41][42] have specified experimentally that the charge transfer UV absorption bands observed in undoped varieties from phosphate, silicate and borate glasses are related to trace iron impurities present within the raw materials used for the preparation of such various glasses.…”

“…pentavalent ions [2,[13][14][15][16]. V 5+ ions belong to the d 0 configuration and thus possess only UV absorption and without visible bands [13][14][15][16][17][18][19][20]. The visible bands around 400, 440 and 580 nm seems to indicate the existence of V 3+ ions in measurable amount.…”

“…The optical absorption spectra of vanadium ions in cabal, silicate, phosphate and borate glasses before and after gamma irradiation have been reported by several investigators [13][14][15][16][17][18]. Vanadium ions are accepted to exist in glasses in three possible valencies, namely, the trivalent, tetravalent and pentavalent states.…”

UV-Visible and IR Spectroscopic Studies of Gamma Irradiated Transition Metal Doped Lead Silicate Glasses

“…Recent studies have been carried out on collective 3d transition metal ions (Ti→Cu) and investigating the effect of the gamma irradiation on UV-visible absorption spectra in various host glasses including phosphate glasses [30,42] bioglasses [43], cabal glasses [44], borosilicate glasses [45], alkali borate glasses [46,47], high lead borate glasses [48] and high lead phosphate glasses [49].…”