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Gamma Radiation Effects on Physical, Optical, and Structural Properties of Binary As–S Glasses
Author(s) -
Sundaram Shanmugavelayutham K.,
McCloy John S.,
Riley Brian J.,
Murphy Mark K.,
Qiao Hong A.,
Windisch Charles F.,
Walter Eric D.,
Crum Jarrod V.,
Golovchak Roman,
Shpotyuk Oleh
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.04938.x
Subject(s) - raman spectroscopy , materials science , irradiation , chalcogenide , refractive index , molar volume , phase (matter) , electron paramagnetic resonance , radiation , microstructure , analytical chemistry (journal) , optics , nuclear magnetic resonance , chemistry , composite material , thermodynamics , optoelectronics , physics , organic chemistry , chromatography , nuclear physics
Gamma radiation is known to induce changes in physical, optical, and structural properties in chalcogenide glasses, but previous research has focused on As 2 S 3 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 As x S 100−x ( x = 30, 33, 36, 40, and 42) glasses were irradiated with gamma radiation using a 60 Co 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.