物理实验
物理實驗
물리실험
PHYSICS EXPERIMENTATION
2014年
10期
4-7
,共4页
普朗克常量%X射线衍射仪%谱线展宽
普朗剋常量%X射線衍射儀%譜線展寬
보랑극상량%X사선연사의%보선전관
Planck constant%X-ray diffraction apparatus%line broadening
讨论了用X射线衍射仪测量普朗克常量的误差来源和改进方法。由于仪器结构和所用透明单晶样品对谱线的展宽效应使不同电压对应的最短波长测量值减小，在计算普朗克常量时应对实验测量的各最短波长进行修正。结果表明用修正的最短波长拟合得到的普朗克常量与理论值基本一致。
討論瞭用X射線衍射儀測量普朗剋常量的誤差來源和改進方法。由于儀器結構和所用透明單晶樣品對譜線的展寬效應使不同電壓對應的最短波長測量值減小，在計算普朗剋常量時應對實驗測量的各最短波長進行脩正。結果錶明用脩正的最短波長擬閤得到的普朗剋常量與理論值基本一緻。
토론료용X사선연사의측량보랑극상량적오차래원화개진방법。유우의기결구화소용투명단정양품대보선적전관효응사불동전압대응적최단파장측량치감소，재계산보랑극상량시응대실험측량적각최단파장진행수정。결과표명용수정적최단파장의합득도적보랑극상량여이론치기본일치。
The cause of the measurement error and the improved approach for measuring the Planck constant by X-ray diffraction were discussed .The measured minimum wavelength in the X-ray spectra decreased with the rising voltage applied on the X-ray tube ,because of the broadening of the X-ray lines due to the apparatus structure and the transparent single crystal sample used for diffrac-tion ,so that the value of the measured minimum wavelength should be revised before calculating the Planck constant .T he results show ed that the value of the Planck constant calculated using the revised data was consistent with the theoretical value .
