Lead-containing alkali/alkaline-earth borate and barium lead phosphate glasses were prepared by melt-quenching for a detailed investigation of the Pb²⁺ ions’ optical properties. UV–Vis absorption and photoluminescence spectroscopy reveal variations in the s–p transition of Pb²⁺, which are shown to correlate with the optical basicity of the host glass in both borates and phosphates. Pb²⁺ emission differs significantly for borate and phosphate glasses, as the nature of the charged sites available to accommodate Pb²⁺ cations vary. Optical basicity values were determined from the composition (Λ_th) and the measured refractive index (Λ_n). The UV-cutoff shifts toward higher wavelengths with increasing optical basicity and lead content. In borate glasses, the frequency of the stretching modes due to nonbridging oxygen atoms of trigonal metaborate species is identified to be inversely proportional to the excitation wavelength (directly proportional to the excitation energy) of Pb²⁺. Lead-containing alkali and alkaline-earth borate glasses show additional correlations between the Pb²⁺ emission wavelength and the weighted average of the field strength of the modifier(s). Complementary to the investigation of optical properties, radiation and neutron shielding parameters were calculated, suggesting the potential utility of some of the studied compositions for radiation shielding applications.

中文翻译：

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Pb2+ 掺杂硼酸盐和磷酸盐玻璃的结构、光谱和辐射屏蔽特性

^{为了详细研究 Pb 2+}离子的光学特性，通过熔体淬火制备了含铅碱金属/碱土金属硼酸盐和磷酸铅钡玻璃。^{UV-Vis 吸收和光致发光光谱揭示了 Pb 2+}的 s-p 跃迁的变化，表明这与主体玻璃在硼酸盐和磷酸盐中的光学碱度相关。硼酸盐玻璃和磷酸盐玻璃的Pb ^{2+发射显着不同，因为可容纳 Pb 2+}阳离子的带电位置的性质不同。光学碱度值由组成 ( Λ _th ) 和测量的折射率 ( Λ _n). 随着光学碱度和铅含量的增加，紫外截止波长向更高波长移动。^{在硼酸盐玻璃中，由三角偏硼酸盐物种的非桥接氧原子引起的拉伸模式的频率被确定为与 Pb 2+}的激发波长成反比（与激发能量成正比）。含铅碱金属和碱土金属硼酸盐玻璃在 Pb ²⁺发射波长与改性剂场强的加权平均值之间显示出额外的相关性。作为对光学特性研究的补充，计算了辐射和中子屏蔽参数，表明某些研究组合物在辐射屏蔽应用中的潜在效用。