大学物理 ›› 2011, Vol. 30 ›› Issue (10): 36-36.

• 著者文摘 • 上一篇    下一篇

基于荧光光谱的玻尔兹曼常量测量

张巍巍[1] 李珊[1] 何兴道[1] 高益庆[1] 陈学岗[2] 朱泉水[2]   

  1. [1]南昌航空大学无损检测技术教育部重点实验室,江西南昌330063 [2]南昌航空大学大学物理实验中心,江西南昌330063
  • 出版日期:2011-10-25 发布日期:2011-10-20

Determining Boltzmann constant with fluorescent spectroscopy

  • Online:2011-10-25 Published:2011-10-20

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%.

关键词: 玻尔兹曼常量, 温度, 基本单位

Abstract: 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.

Key words: Boltzmann constant, temperature, fundamental unit

中图分类号: 

  • O414.2