Gamma Rays Interactions with Strontium Borate Glasses Doped with First-Row Transition Metal Oxides

Abstract

Optical and FT IR absorption spectroscopic studies were carried out to investigate the spectral properties of prepd. undoped and 3d transition metal oxides-doped-strontium borate glasses. The same measurements were repeated after gamma-irradn. of the samples with a dose of 8 Mrad (8 × 104 Gy). The undoped strontium borate glass before irradn. exhibits a broad strong UV absorption which is related to unavoidable trace iron (Fe3+ ions) impurities contaminated within the raw materials used for the prepn. of this glass. Examn. of the optical spectra of TMs-doped glasses reveals extra characteristic UV-visible bands due to the resp. doping 3d transition metal ions. Gamma irradn. of the undoped strontium borate glass produces induced defects within the UV and visible regions while the TMsdoped glasses reveal limited variations due to shielding effects of some TM ions in this specific host strontium borate doped glasses towards gamma irradn. IR absorption spectra of the prepd. glasses reveal characteristic vibrational bands due to both triangular and tetrahedral borate groups within the wavenumber range 1200-1600 cm-1 and 800-1200 cm-1, resp. The addn. of 3d TM dopants (0.2 %) causes no distinct variations in the main IR vibrational bands because of the low level of TM ions and their housing in the glass network structure as modifiers. Also, gamma irradn. causes no changes in the no. or position of the main characteristic IR vibration bands due to the quite stability of the base glass contg. high content of heavy metal (Sr2+) cations. [on SciFinder(R)]