双波长吸收法探测原子蒸气温度的研究

MEASUREMENT OF TEMPERATURE OF ATOMIC VAPOUR BY TWO WAVELENGTH ABSORPTION

本文研究了吸收系数和振子强度、粒子数密度之间的对应关系,测量二个共振吸收波长经过原子蒸气的吸光度后,根据玻尔兹曼分布导出了原子蒸气的等效温度,消除了蒸气和加热器之间的温度测量偏差,使双波长吸收成为一种探测温度的有效方法,讨论了吸收线线型对温度测量的影响和近似方法,提出了吸收法测温对于原子参数的要求,分析了四种测温元素的参数条件。

The dependence of absorption coefficient on osci'allator strength and density was described.According to Boltzman's distribution, the temperature of atomic vapour was derived from absorbances of two resonance wavelengths. This method of measuring temperature is efficient to eliminate the deviation between vapours and heaters. The effect of line shape on the measurement was discussed and a approximate way was given. The demands on atomic parameters were also discussed and four elements have been analyted.