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利用中子辐照改色法把天然无色黄玉改成蓝色黄玉,对天然黄玉和改色后的蓝黄玉分别进行了常规检测、X-荧光测试、紫外-可见光谱测试及红外光谱测试研究。结果表明:改色前后黄玉的比重、折射率、成分都没有明显的变化;其紫外-可见光光谱、红外光谱存在一定的差异。这些差异为鉴别天然黄玉与辐照改色黄玉提供了依据。
The natural colorless topaz was changed into blue topaz by means of neutron irradiation and color changing method. The routine testing, X-fluorescence test, ultraviolet-visible spectrum test and infrared spectroscopy test of natural topaz and blue topaz were carried out. The results showed that the specific gravity, refractive index and composition of the topaz did not change significantly before and after the color change. There were some differences in UV-Vis spectra and IR spectra. These differences provide a basis for identification of natural topaz and irradiated topaz.