|- - peak - -|   | - - - fit - - - - - - |                ROI
  Energy  counts   Energy    FWHM,error(eV)      E/dE    counts      acf     acf_err
 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 1.02135     14   1.02124    0.752   0.095      1358.4     118    0.078138  0.015905  
 1.47133     12   1.47160    2.008   0.303       732.9     112    0.061224  0.012927  
 1.86380     13   1.86365    1.956   0.317       952.8     100    0.067600  0.015872