Here, this study investigated the structural changes and radiation shielding efficiency of a borate glass host modified by varying cadmium oxide (CdO) concentrations. The glass composition consisted of boron oxide (BO; 80:56 mol%), sodium oxide (NaO; 19.6 mol%), and cobalt oxide (CoO; 0.4 mol%), with cadmium oxide (CdO; 0:24 mol%). The glass structure was analyzed utilizing mass density and FT-infrared spectroscopy (FTIR) in the 400 to 1600 cm range, while radiation shielding properties were investigated utilizing the online Phy-X software in the 0.284–1.333 MeV energy window. Notably, the addition of CdO significantly impacted the glass density, increasing it by approximately 93 % as the added CdO concentration rose from 0 to 24 mol% (i.e., from 2.507 g/cm to 4.849 g/cm). FTIR analysis revealed a concurrent increase in BO structural units with increasing CdO/BO ratios. This observation was supported by the calculated NBO/(BO+BO) ratio, which increased from 40.73% for the CdO-free sample to 52.00% for the highest CdO content. This increase in BO units, denser than BO units, explains the observed density increase. Conversely, the concentration of non-bridging oxygens decreased from 10.14% to 4.34% with increasing CdO contents, indicating a more tightly packed glass network. Radiation shielding studies demonstrated that increasing CdO concentration from 0 to 24 mol% enhanced the shielding efficiency, evidenced by a decrease in the half-value layer parameter (HVL). The radiation protection efficacy (RPE) also increased from 0.214 to 0.426 for the CdO-free sample to the sample containing 24 mol% CdO at the investigated energy level. This finding highlights the superior shielding capability of the CdO-rich sample. Furthermore, the transmission factor (TF) was investigated for a constant thickness of 0.75 cm for glasses. The CdO-rich sample exhibited a lower TF compared to the CdO-free sample, particularly at lower energies. This finding confirms that, for a given thickness and energy, raising the cadmium oxide content in the current composition leads to an observed mitigation in the transmitted radiation.

中文翻译：

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高CdO含量对CoO-Na2O-B2O3玻璃体系结构和辐射屏蔽效率的组成影响


本研究研究了通过改变氧化镉 (CdO) 浓度改性的硼酸盐玻璃主体的结构变化和辐射屏蔽效率。玻璃成分由氧化硼 (BO; 80:56 mol%)、氧化钠 (NaO; 19.6 mol%) 和氧化钴 (CoO; 0.4 mol%) 以及氧化镉 (CdO; 0:24 mol%) 组成。利用质量密度和 FT 红外光谱 (FTIR) 在 400 至 1600 cm 范围内分析玻璃结构，同时利用在线 Phy-X 软件在 0.284–1.333 MeV 能量窗口研究辐射屏蔽性能。值得注意的是，CdO 的添加显着影响了玻璃密度，当添加的 CdO 浓度从 0 摩尔% 升至 24 mol%（即从 2.507 g/cm3 升至 4.849 g/cm3）时，玻璃密度增加了约 93%。 FTIR 分析表明，BO 结构单元随着 CdO/BO 比率的增加而同时增加。计算得出的 NBO/(BO+BO) 比率支持了这一观察结果，该比率从不含 CdO 的样品的 40.73% 增加到最高 CdO 含量的 52.00%。 BO 单元的这种增加（比 BO 单元更密集）解释了观察到的密度增加。相反，随着 CdO 含量的增加，非桥氧的浓度从 10.14% 下降到 4.34%，表明玻璃网络堆积更紧密。辐射屏蔽研究表明，将 CdO 浓度从 0 mol% 增加到 24 mol% 可提高屏蔽效率，半值层参数 (HVL) 的降低证明了这一点。在研究的能级下，不含 CdO 的样品的辐射防护功效 (RPE) 也从 0.214 增加到 0.426，而含 24 mol% CdO 的样品的辐射防护功效 (RPE) 也从 0.214 增加到 0.426。这一发现凸显了富含氧化镉的样品的卓越屏蔽能力。 此外，还研究了厚度恒定为 0.75 cm 的玻璃的透射系数 (TF)。与不含 CdO 的样品相比，富含 CdO 的样品表现出较低的 TF，特别是在较低能量下。这一发现证实，对于给定的厚度和能量，提高当前组合物中的氧化镉含量会导致观察到的透射辐射的减轻。