|- - peak - -|   | - - - fit - - - - - - |                ROI
  Energy  counts   Energy    FWHM,error(eV)      E/dE    counts      acf     acf_err
 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 0.811911    10   0.811782   0.659   0.164      1232.4      73    0.064365  0.017591  
 0.825655    19   0.825805   1.195   0.150       691.1     259    0.040116  0.005569  
 0.872487    10   0.872579   1.317   0.323       662.5     114    0.044014  0.009272  
 1.02143     20   1.02179    1.455   0.144       702.1     269    0.042495  0.005780  
 1.35156     10   1.35179    2.956   0.746       457.3     101    0.044603  0.010220