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

Abstract

Optical and FT infrared absorption spectroscopic studies were carried out to investigate the spectral properties of prepared undoped and 3d transition metal oxides-doped-strontium borate glasses. The same measurements were repeated after gamma-irradiation of the samples with a dose of 8 Mrad (8  10 4 Gy). The undoped strontium borate glass before irradiation exhibits a broad strong UV absorption which is related to unavoidable trace iron (Fe 3+ ions) impurities contaminated within the raw materials used for the preparation of this glass. Examination of the optical spectra of TMs-doped glasses reveals extra characteristic UV-visible bands due to the respective doping 3d transition metal ions. Gamma irradiation 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 irradiation.Infrared absorption spectra of the prepared 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 , respectively. The addition 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 irradiation causes no changes in the number or position of the main characteristic IR vibration bands due to the quite stability of the base glass containing high content of heavy metal (Sr 2+ ) cations.

Variation of structure and optical material dispersion in lead borate glass containing multi valence chromium and germanium cations

“…The observed peaks in the second region at 708-713 cm -1 are attributed to the combined vibrations of the BO3 (Vijay et al 2015) and PbO4 groups (Varshneya 1994), bending vibration of the B-O-B linkage in the borate network (ElBatal et al 2014;Kamitsos et al 1987Kamitsos et al , 1981, and the stretching mode of Ge-O-Ge bonds in GeO6 units (Narendrudu et al 2016;Tenny and Wong 1972).…”

“…The absorption peak appeared in the wave number range 1384-1391 cm -1 possibly due to the asymmetric relaxation of the B-O bond of the triangular [BO3] units (Varshneya 1994;ElBatal et al 2014;Kamitsos et al 1987Kamitsos et al , 1981Doweidar and Oraby 1997) stretching vibrations of the borate triangles with non-bridging oxygen (NBO) in various borate groups (Chelcea et al 2011), and the asymmetric stretching vibration modes of Ge-O-Ge bonds (Narendrudu et al 2016). Moreover, in Fig.…”

Structural, Optical and Thermal Characterizations of Lithium Borate Glasses Containing the Barite

“…(c). BO3 borate stretching groups, the peaks at ~1300 cm -1 , and 1500 cm -1 are related to B-O vibrations of triangular groups [15]. (d).…”