Determination of the C defect concentration in HPHT annealed type IaA diamonds from UV-VIS absorption spectra

被引:18
作者
De Weerdt, F. [1 ,2 ]
Collins, A. T. [2 ]
机构
[1] HRD Res, B-2500 Lier, Belgium
[2] Kings Coll London, Dept Phys, London WC2R 2LS, England
关键词
C defects; defect concentration;
D O I
10.1016/j.diamond.2007.11.014
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Low concentrations of C defects (<5 ppm) in type I diamonds are difficult to determine accurately by infrared (IR) absorption measurements. It is also impossible to measure the concentration of C defects from the intensity of the 270 nm band in the UV absorption spectrum of a type IaA/Ib diamond. This paper will present a different method to determine the concentration of C defects in a type IaA/Ib diamond, by measuring the absorption coefficient at 400 nm in the UV-VIS absorption spectrum. The proportionality coefficient between the intensity of the absorption at 400 nm (in cm(-1)) and the concentration of C defects (in ppm) is 2.00 +/- 0.04 ppm/cm(-1). (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:171 / 173
页数:3
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