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用放射性同位素作为闪烁物质的激发能源,将闪烁物质发出的光用作光源,是近年来同位素应用的一个方面,本文介绍将这种光源用于分光光度分析。 同位素光源由闪烁体和少量β放射性同位素组成,闪烁物质可以是液体或固体,同位素可以与闪烁体混合,或是喷镀在固体闪烁体上,亦可放在闪烁体附近。β粒子引起闪烁体激发,产生可见光范围的次级发射。 在分光光度分析中,用同位素光源作光源,消除了由于电源系统不稳定而造成的光通量波动,从而提高
The use of radioactive isotopes as the excitation energy for scintillating materials and the use of light emitted by scintillating materials as a source of light have been one aspect of the application of isotopes in recent years and this article describes the use of such a light source for spectrophotometric analysis. Isotope sources consist of a scintillator and a small amount of beta radioactive isotopes. The scintillating substance can be a liquid or a solid. The isotopes can be mixed with the scintillator, either on a solid scintillator or in the vicinity of the scintillator. The beta particles cause the scintillator to excite, resulting in a secondary emission in the visible range. In spectrophotometric analysis, using isotope light sources as light sources eliminates fluctuations in the luminous flux due to instability of the power system, thereby increasing