Gamma Radiation Effects on Physical, Optical, and Structural Properties of Binary As-S Glasses

• Published in: Journal of the American Ceramic Society Vol. 95; no. 3; pp. 1048 - 1055
• Main Authors: Sundaram, Shanmugavelayutham K., McCloy, John S., Riley, Brian J., Murphy, Mark K., Qiao, Hong A., Windisch Jr, Charles F., Walter, Eric D., Crum, Jarrod V., Golovchak, Roman, Shpotyuk, Oleh
• Format: Journal Article
• Language: English
• Published: Columbus Blackwell Publishing Ltd 01-03-2012; Wiley Subscription Services, Inc
• Subjects: AGING; Ceramics; chalcogenide glass, gamma irradiation, high dose dosimetry; CHALCOGENIDES; Constraints; Density; Diffraction; Electron paramagnetic resonance; Environmental Molecular Sciences Laboratory; GAMMA RADIATION; Gamma rays; GLASS; IRRADIATION; MATERIALS SCIENCE; Nanomaterials; Nanostructure; Optical properties; REFRACTIVE INDEX; STABILITY; X-RAY DIFFRACTION
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/j.1551-2916.2011.04938.x

Gamma radiation is known to induce changes in physical, optical, and structural properties in chalcogenide glasses, but previous research has focused on As2S3 and families of glasses containing Ge. For the first time, we present composition and dose dependent data on the As–S binary glass series. Binary AsxS100−x (x = 30, 33, 36, 40, and 42) glasses were irradiated with gamma radiation using a 60Co source at 2.8 Gy/s to accumulated doses of 1, 2, 3, and 4 MGy. The irradiated samples were characterized at each dose level for density, refractive index, X‐ray diffraction (XRD), and Raman spectrum. We report an initial increase in density followed by a decrease as a function of dose that contradicts the expected compositional dependence of molar volume of these glasses. This unusual behavior is explained based on microvoid formation and nanoscale phase‐separation induced by the irradiation. XRD, Raman, and electron spin resonance data provide supporting evidence, underscoring the importance of optimally‐ or overly constrained structures for stability under irradiation.