Verification of Bohr’s frequency condition and Moseley’s law: An undergraduate laboratory experiment

Abstract

We describe an undergraduate laboratory experiment to verify Bohr’s frequency condition and Moseley’s law using a thin NaI(Tl) detector spectrometer and a weak Co57 source. The slope of the plot of Kα x-ray energy versus (Z−1)2 yields a value for the Rydberg constant, R=(1.19±0.01)×107 m−1, which is in fair agreement with the best literature value, R=10 973 731.534(13) m−1.