Next, you describe what your paper proposes to do about this puzzle, i.e., you propose a solution. Section III presents the results and introduces the error analysis we performed. This includes any fancy tools you use or any special data processing. It can also include a word or two on known systematic errors or limitations of the technique. Schematics of the set-up go here.
Calibration curves have their home here, too.
The results section is supposed to be bias-free. No matter what theories will be cooked up in the future and be coerced to fit your data, your data will stand the test of time if it was taken carefully and properly. In this section you celebrate that very data. If it gives the electron density then the implication of the resulting value are discussed here. XYZ could be the previous team working on your experiment.