|- - peak - -|   | - - - fit - - - - - - |                ROI
  Energy  counts   Energy    FWHM,error(eV)      E/dE    counts      acf     acf_err
 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 0.739846    10   0.739988   0.586   0.167      1263.2      62    0.067638  0.021070  
 0.827259    17   0.827184   0.720   0.083      1148.6     174    0.053243  0.009077  
 1.02325     14   1.02339    1.406   0.184       727.6     174    0.046241  0.007826  
 1.35568     15   1.35512    1.900   0.269       713.3     145    0.049798  0.009451  
 1.47530     10   1.47575    2.284   0.486       646.1     100    0.050200  0.011876