电子顺磁共振强度标样的研究  

AN INVESTIGATION ON THE INTENSITY STANDARD OF EPR

作　　者：眭云霞[1] 

机构地区：[1]南京大学现代分析中心

出　　处：《南京大学学报（自然科学版）》1996年第1期43-46,共4页Journal of Nanjing University（Natural Science）

摘　　要：报导了用天然煤制备用于电子顺磁共振（ＥＰＲ）研究的强度标准样品。在室温Ｘ波段对煤标样作了ＥＰＲ研究。天然煤具有各向同性的ＥＰＲ谱，ΔＢＰＰ＝０．３４ｍＴ，ｇ＝２．００２６。以美国国家标准局提供的掺Ｃｒ３＋红宝石单晶作为一级标准，对煤标样定标，定出煤标样的自旋数从１０１４到１０１７，按量级变化。并用来自德国的非晶硅片状标样对煤标样作了定量比较，其结果非常吻合。与几种常用的ＥＰＲ标样比较，天然煤标样具有采样方便，制备简单，线宽窄。An EPR intensity standard based on natural coal was reported. EPR was measured at room temperature in X-band. The isotropic spectrum of coal with the ΔB PP =0.34mT, g =2.0026 was obtained. A single crystal of ruby (1.5×1.5×0.5mm) doped with 3.69×10 15 Cr 3+ /mg, provided by natural Bureau of Standard of USA, was uesd as the first standard. The number of spins for intensity standard of coal was datermined by using ruby standard. Four samples of coal standard were prepared; their spins range from 10 14 to 10 17 . Moreover, the spins of coal standard were compared with an amorphous silicon a si intensity standard from Germany. The results were found quite coincident. The main features of coal standard were: physically and chemically stable at room temperature, easy to sample and prepare, and cheap.

关 键 词：电子顺磁共振 强度标准 自旋数 天然煤 

分 类 号：O482.533[理学—固体物理]