Gamma rays interaction with ternary silicate glasses containing mixed CoO+NiO
Gamma rays interaction with ternary silicate glasses containing mixed CoO+NiO
复制标题
伽马射线与含有混合 CoO NiO 的三元硅酸盐玻璃的相互作用
DOI：
10.1016/s0254-0584(03)00270-0
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发表时间：
2003
影响因子：
4.6
通讯作者：
S. Desouky
中科院分区：
文献类型：
--
作者：
F. ElBatal;Magda M. I. Khalil;N. Nada;S. Desouky
在本工作中，玻璃成分和γ射线辐照的光学和红外吸收光谱的一些选定的三元硅酸盐玻璃含有混合CoO+NiO的影响进行了研究。实验结果表明，无色母体未掺杂的三元硅酸盐玻璃没有可见光吸收。在γ射线照射后，在可见光区观察到两个诱导吸收带。含有混合CoO+NiO的三元硅酸盐玻璃在辐照前显示出由Co ~（2+）和Ni ~（2+）离子引起的特征谱带。在逐步照射时，UV带的强度增加，并转移到更长的波长，掩盖了第一和第二可见光带。混合掺杂剂CoO+NiO的引入对硅酸盐链的主要红外吸收特征带没有影响。玻璃经γ射线辐照后，红外吸收带强度先增强后趋于稳定。实验结果解释假设CoO和NiO主要存在可能的四面体和八面体配位的二价离子。Co ~（2+）和Ni ~（2+）的可见光吸收峰同时出现，当它们占据邻近位置时，它们会发生干涉。诱导吸收光谱表现出由本征基础硅酸盐玻璃和相应的过渡金属离子引起的特征吸收带。掺杂玻璃对γ射线辐照的响应被认为与长时间辐照诱导色心的形成和湮灭有关。
In the present work, the effects of glass composition and gamma rays irradiation on the optical and infrared absorption spectra of some selected ternary silicate glasses containing mixed CoO+NiO were studied. Experimental results reveal that the colorless parent undoped ternary silicate glasses show no visible absorption. Upon gamma irradiation, two induced absorption bands are observed in the visible region. Ternary silicate glasses containing mixed CoO+NiO show before irradiation the characteristic bands due to both Co2+and Ni2+ions. On progressive irradiation, the UV bands increase in their intensities and shift to longer wavelengths masking the first and second visible bands. The introduction of mixed dopant CoO+NiO shows no effect on the main infrared absorption characteristic bands for silicate chains. Gamma irradiation of the glass increases the intensities of infrared absorption bands at first and the intensities almost stabilized with further irradiation. The experimental results are interpreted assuming that CoO and NiO exist mainly as divalent ions with possible tetra and octahedral coordinations. The optical visible absorption bands of both Co2+and Ni2+appeared together and interfere whenever they occupy nearby positions. The induced absorption spectra exhibit the characteristic absorption bands caused by the intrinsic base silicate glass and the respective transition metal ions. The response of the doped glasses to gamma rays irradiation is assumed to be related to the formation and annihilation of the induced color centers with prolonged irradiation.