Mass Ratio of the Deuteron and Proton from the Balmer Spectrum of Hydrogen Variation on an Undergraduate Physical Chemistry Experiment
Mass Ratio of the Deuteron and Proton from the Balmer Spectrum of Hydrogen Variation on an Undergraduate Physical Chemistry Experiment
复制标题
本科物理化学实验中氢变化巴尔默谱中氘核和质子的质量比
DOI：
10.1021/ed073p1055
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发表时间：
1996
影响因子：
3
通讯作者：
L. R. Khundkar
中科院分区：
文献类型：
--
作者：
L. R. Khundkar
在一些物理化学实验课程中，一个常见的实验涉及分析氢原子的巴尔末系列，以推导出里德伯常数。我们描述了这个实验的一个简单的修改，其中涉及到氢原子和氘原子的巴耳末光谱的比较，以确定它们的核质量比。实验的准确度依赖于氘灯中沿着2 H2的足够量的1 H2，以用作内标。在我们的实现中，我们使用齿轮驱动的0.25米扫描单色仪与1200线/毫米光栅。我们测量的质量比的典型精度优于10%。
A common experiment in some Physical Chemistry Laboratory courses involves the analysis of the Balmer series of the hydrogen atom to derive the Rydberg constant. We describe a simple modification of this experiment, which involves a comparison of the Balmer spectrum of hydrogen and deuteron atoms to determine their nuclear mass ratio. The accuracy of the experiment relies on a sufficient amount of 1H2 being present along with 2H2 in the deuterium lamp for its use as an internal standard. In our implementation, we use a gear-driven 0.25 m scanning monochromator with a 1200 lines/mm grating. The typical precision of our measured mass ratio is better than 10 %.