| 辐射处理金刚石的谱学研究及其意义 |
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| 引用本文： | 苑执中,彭明生,蒙宇飞.辐射处理金刚石的谱学研究及其意义[J].矿物岩石,2005,25(3):47-51. |
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| 作者姓名： | 苑执中 彭明生 蒙宇飞 |
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| 作者单位： | 中山大学地球科学系宝石矿物材料研究所,广东,广州,510275;中山大学地球科学系宝石矿物材料研究所,广东,广州,510275;中山大学地球科学系宝石矿物材料研究所,广东,广州,510275 |
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| 基金项目： | 广东省自然科学基金资助项目（编号：980269） |
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| 摘 要： | 利用傅立叶显微红外光谱、紫外-可见-近红外吸收光谱、低温光致发光谱、拉曼光谱等4种谱学方法，对10颗辐照改色（R1-R10）的彩色天然金刚石进行了研究。利用可见吸收光谱和低温光致发光谱研究了金刚石石中的点缺陷产生系列的色心峰，指出在可见吸收光谱中除了有N3心吸收峰外，还可见595和637色心峰；在低温光致发光谱中发现有色心组合峰575，595和637等的出现，此组合峰与近红外区4929cm^-1处的H1b和5156cm^-1处的H1C色心峰共同存时，不仅是辐照处理绿色金刚石的鉴定证据，也是辐照处理各种彩色金刚石的重要的标志之一。本研究为辐射处理金刚石的鉴别和工艺流程提供了新的谱学依据和思路。
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| 关 键 词： | 辐照彩色金刚石 傅立叶显微红外光谱 紫外-可见-近红外吸收光谱 低温光致发光光谱 色心 |
| 文章编号： | 1001-6872（2005）03-0047-05 |
| 收稿时间： | 2005-04-27 |
| 修稿时间： | 2005-07-25 |
SPECTROSCOPIC STUDIES ON IRRADIATED ENHANCED FANCY COLOR DIAMONDS |
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| YUAN Joe C C,PENG Ming-sheng,MENG Yu-fei.SPECTROSCOPIC STUDIES ON IRRADIATED ENHANCED FANCY COLOR DIAMONDS[J].Journal of Mineralogy and Petrology,2005,25(3):47-51. |
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| Authors: | YUAN Joe C C PENG Ming-sheng MENG Yu-fei |
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| Abstract: | Spectroscopic studies through FTIR,UV-visible-near infrared absorption,photoluminescence and Raman spectroscopy are used to study 10 natural diamonds (R1-R10) with fancy color due to irradiation.These diamonds are classified based on their FTIR characteristics.The visible absorption and low temperature photoluminescence spectroscopy indicates that there are a number of color-center peaks due to point defects.In addition to the N3 absorption peak,the peaks at 595 and 637 nm are also observed.The color-center peaks at 575,595 and 637 nm in the low-temperature photo-induced luminescence spectra,in combination with the H_1b color center at 4 929 cm~(-1) and the H_1c color center at 5 156 cm~(-1) in the near infrared spectra,are not only reliable evidence for green diamonds due to irradiation,but also an important characteristics of other color diamonds due to irradiation.Therefore,after studying and analyzing near 50 diagrams,the spectroscopic characteristics of color diamonds due to irradiation provide new and important evidence for understanding the colored mechanisms due to irradiation and for distinguishing different types of diamonds |
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| Keywords: | fancy color of irradiated diamonds FTIR UV-visible-near infrared absorption photoluminescence spectroscopy(PL) color-center |
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