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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Interaction of gamma rays with some sodium phosphate glasses containing cobalt
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Interaction of gamma rays with some sodium phosphate glasses containing cobalt

机译：伽马射线与某些含钴的磷酸钠玻璃的相互作用

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摘要

Undoped and cobalt-doped sodium phosphate glasses of various compositions and with varying cobalt contents were prepared. UV-visible absorption spectra were measured before and after successive gamma irradiation. Experimental results indicated that the undoped base glass reveals strong ultraviolet absorption which is related to the presence of unavoidable trace iron impurities in the raw materials. Cobalt-doped glasses show characteristic visible absorption bands which are related to the presence of Co~(2+) ions mostly in the tetra-coordination state. The generated induced color centers in the UV and visible regions by gamma irradiation are characterized in relation to intrinsic defects from the host base sodium phosphate glass and the extrinsic defects from both trace iron impurities and added doped cobalt ions. Infrared absorption measurements were carried out for some selected samples to identify the structural building groups in the studied glasses. Cobalt ions showed a shielding behavior towards the effects of progressive gamma irradiation especially in the visible spectral region.
机译：制备了各种组成且钴含量变化的未掺杂和钴掺杂的磷酸钠玻璃。在连续的γ辐照之前和之后测量UV-可见吸收光谱。实验结果表明，未掺杂的中空玻璃具有较强的紫外线吸收能力，这与原料中不可避免的痕量铁杂质的存在有关。钴掺杂玻璃显示出特征性的可见吸收带，该吸收带主要与四配位态下的Co〜（2+）离子有关。通过γ射线辐照，在UV和可见光区域产生的诱导色中心的特征与基质磷酸钠玻璃的固有缺陷以及痕量铁杂质和添加的掺杂钴离子的外部缺陷有关。对一些选定的样品进行了红外吸收测量，以识别研究玻璃中的结构建筑群。钴离子对渐进式伽马射线辐射的影响表现出屏蔽作用，尤其是在可见光谱区域。

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