Retrieve real measured nuclear reaction data (cross sections, angular distributions, spectra, resonance data) from the IAEA EXFOR database and parse it into clean columns for comparison with a calculation. Use whenever experiment enters the picture: 实验数据, 有没有实验数据, 找实验点, EXFOR, 对比实验, compare with experiment, measured cross section, angular distribution data, add the data to this plot, is there data at this energy. Also use before claiming that a measurement does or does not exist.
