|- - peak - -|   | - - - fit - - - - - - |                ROI
  Energy  counts   Energy    FWHM,error(eV)      E/dE    counts      acf     acf_err
 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 0.826594    12   0.826776   0.790   0.135      1047.0      68    0.098183  0.026977  
 1.02294     12   1.02265    0.983   0.176      1040.0      80    0.091875  0.023323  
 1.35398     10   1.35432    1.966   0.397       689.0      70    0.072653  0.020187