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(R 1-R 10)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N 3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4 929 cm-1处的H1b和5156 cm-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。
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 H1b color center at 4 929 cm^-1 and the H1c 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.
出处
《矿物岩石》
CAS
CSCD
北大核心
2005年第3期47-51,共5页
Mineralogy and Petrology
基金
广东省自然科学基金资助项目(编号:980269)
