|- - peak - -|   | - - - fit - - - - - - |                ROI
  Energy  counts   Energy    FWHM,error(eV)      E/dE    counts      acf     acf_err
 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 0.825320    12   0.825285   0.521   0.100      1585.5      63    0.096498  0.029118  
 1.02038     10   1.02090    1.407   0.340       725.4      58    0.099287  0.029583  
 1.34987     10   1.35071    1.798   0.508       751.0      74    0.063550  0.017675