EFFECTS OF HYDROGEN & TRANSITION METALS ON RADIATION DAMAGE IN GLASSES

目的是了解当地结构的变化， 包括复合硼硅酸盐玻璃中缺陷的结构 在氢气存在和不存在的情况下进行伽马辐照。我们 正在研究几种商用硼硅酸盐组合物(CGW-7052， GSC-4、CGW-7740、CGW-3320)、纯二氧化硅(T-08)、几个更简单的 式(Na2O)x(B2O3)x(SiO_2)y和碱的组成 偏磷酸盐玻璃，其中一些已经掺杂了微量 用电子顺磁共振测定过渡金属的量 和核磁共振。我们希望澄清的作用是 A)顺磁缺陷的破坏/抑制 玻璃，b)密度和可能的其他材料性质的变化 和c)氧化态的变化 玻璃中过渡金属的含量。

The aim is to understand changes to the local structure, including the structure of defects in complex borosilicate glasses when gamma-irradiated in the presence and absence of hydrogen gas. We are examining several commercial borosilicate compositions (CGW-7052, GSC-4, CGW-7740, CGW-3320), pure silica (T-08), several simpler compositions of the formula (Na2O)x (B2O3)x (SiO2)y, and alkali metaphosphate glasses, some of which have been doped with trace amounts of transition metals, using electron paramagnetic resonance and nuclear magnetic resonance. We hope to clarify the role of hydrogen in a) the destruction/suppression of paramagnetic defects in glass, b) changes in density and possibly other materials properties of glass upon gamma-irradiation, and c) changes in the oxidation state of transition metals in glass.