金刚石的ESR和3-DTL谱图特征  

The characteristics of ESR and 3-D TL spectra of diamonds

作　　者：刘顺生[1] 李旭[1] 傅慧芳[1] Günther A. Wagner 

机构地区：[1]中国科学院长沙大地构造研究所,长沙410013 [2]Max-Planck-Institut für Kernphysik

出　　处：《核技术》2003年第1期28-31,共4页Nuclear Techniques

基　　金：国家自然科学基金 (4 9672 10 0 )资助 ;中国科学院资源与生态环境研究重点项目和中国科学院与德国马普学会合作项目资助

摘　　要：对天然金刚石、高温高压人造金刚石和高温低压化学气相沉积金刚石进行了电子自旋共振 (ESR)和三维热释光 (3-DTL)测量。谱图特征表明 ,在天然金刚石和高温高压人造金刚石中 ,具有电子自旋共振性质的氮主要以孤氮、氮的交换相互作用对和S =1的氮对心的形式存在 ,化学气相沉积金刚石的ESR谱比较简单 ,它只有一个峰 ,由金刚石中未饱和碳键的悬空键所引起。对于 3-DTL谱 ,在 10 0— 2 0 0℃升温范围 ,天然金刚石有～ 370nm和～ 5 10nm两个释光峰 ,高温高压人造金刚石有～ 370nm的释光峰 ,化学气相沉积金刚石有～ 5 10nm的释光峰。这些谱图特征对金刚石的质量鉴定。Electron Spin Resonance (ESR) and 3-dimensional Thermoluminescence (3-D TL) spectra of natural diamond, high temperature-high pressure artificial diamond and high temperature-low pressure chemical vapor deposited (CVD) diamond were determined. The characteristics of spectra have been studied. It is found that isolated nitrogen, nitrogen exchange pair and nitrogen atom pair ( S =1) are main forms of electron spin resonancial nitrogen in natural and high temperature-high pressure artificial diamonds. The spectrum of CVD diamond is smpler, and contains only one peak caused by suspended bond of unsaturated carbon ones. For 3-D TL spectra, natural diamond has two peaks (～370 nm and ～510 nm) in 100-200℃ temperature range, high temperature-high pressure artificial diamond only has ～370 nm peak, and CVD diamond only has ～500 nm peak. These characteristics would be useful for the quality inspection and classification of diamonds, as well as for the study of geologic actions associated with natural diamond.

关 键 词：ESR 3-DTL 谱图特征 电子自旋共振 三维热释光 金刚石 矿物 

分 类 号：P578.16[天文地球—矿物学] P575.4[天文地球—地质学]