云冈石窟内外石雕风化差异的光谱研究

发布时间：2018-05-18 07:00

本文选题：太赫兹时域光谱技术 + 光谱分析　；参考：《内蒙古大学学报(自然科学版)》2013年06期

【摘要】：利用太赫兹时域光谱系统测试由云冈石窟第4、9、38窟的内部和外部所采集的风化石雕样品后,分析研究各样品在太赫兹波段的光谱特性.结果表明,低频区石窟内部样品的透射系数大于相应石窟外部所取样品的透射系数,而在高频区则相反;吸收谱则表明,在低频区所有样品的吸收都非常弱,随着频率的增大,吸收系数以接近指数函数的形式快速增大,特别是石窟内部样品的增长明显高于石窟外部样品;在整个太赫兹波段,石窟内部样品的折射率均大于石窟外部样品的折射率.据此,可以将石窟内外两种风化程度不同的样品区分开来,为石雕风化物研究提供太赫兹波段的光谱鉴定方法.
[Abstract]:The terahertz time-domain spectroscopy system was used to test the weathered stone sculptures collected from the interior and exterior of Yungang Grottoes No. 4, and the spectral characteristics of the samples in terahertz band were analyzed and studied. The results show that the transmission coefficient of the samples inside the grottoes in the low frequency region is greater than that of the samples taken outside the corresponding grottoes, while in the high frequency region, the absorption spectra show that the absorption of all the samples in the low frequency region is very weak, and with the increase of the frequency, The absorption coefficient increases rapidly in the form of close to exponential function, especially the increase of the internal sample is obviously higher than that of the external sample, and the refractive index of the inner sample is larger than that of the external sample in the whole terahertz band. Based on this, two kinds of samples with different weathering degree inside and outside the grottoes can be distinguished, and the spectral identification method of terahertz band can be provided for the study of weathering materials of stone carvings.
【作者单位】：山西大同大学物理与电子科学学院;河北省国土资源厅矿产资源储量评审中心;首都师范大学物理系;
【基金】：国家科技支撑计划课题(2009BAK53B01) 山西省高等学校哲学社会科学研究基地项目(2010317)
【分类号】：K879.22;TN219

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