Measurements of K x-ray fluorescence parameters

摘要

A simple x-ray fluorescence experiment suitable for graduate and undergraduate laboratories is described. The experiment uses a NaI(Tl) x-ray spectrometer, a weak Co-57 radioactive source (similar to 10(5) Bq), and medium-Z targets of silver, cadmium, indium, and tin. The K x-ray fluorescence yield, omega(k), and K x-ray production cross section, sigma(k), are measured for these targets. Accurate results are achieved by adopting a 2 pi detection geometry and by optimizing target dimensions for this experimental configuration. The experiment can be completed in 4 h and is suitable for student laboratories. (c) 2005 American Association of Physics Teachers.