摘要
玻尔兹曼常量的准确测量有助于对温度基本单位的重新定义.本文提出了一类测量玻尔兹曼常量的方法———荧光光谱方法:根据电子占据不同能级的玻尔兹曼分布规律,通过测量不同温度下荧光材料的荧光光谱,分析温度对荧光强度比例的影响,推导得到玻尔兹曼常量kB与hc(普朗克常量与真空光速的乘积)的数值关系.kB值的初步测量结果与目前CODATA推荐值(2006年)的偏差约0.2%.
The Boltzmann constant kB is used in the new definition of temperature unit-Kelvin.In this article,the fluorescent spectroscopic method is introduced to determine this constant.Population of electrons in thermal coupled levels of phosphors can be described with the Boltzmann distribution.Based on temperature dependent photoluminescence of a phosphor,the Boltzmann constant is derived from the relationship between measured relative intensity and temperature.Relationship between kB and hc（the Planck constant multiplying light speed in vacuum） is derived from experimental measurement.The determined Boltzmann constant shows ～0.2% divergence upon the value recommended by CODATA in the year 2006.
出处
《大学物理》
北大核心
2011年第10期36-38,41,共4页
College Physics
基金
江西省自然科学基金(2010GZW0054)
江西省科技支撑计划
中国航空科技航空检测与评价技术重点实验室开放基金(HK2009001)资助
关键词
玻尔兹曼常量
温度
基本单位
Boltzmann constant
temperature
fundamental unit
