|- - peak - -|   | - - - fit - - - - - - |                ROI
  Energy  counts   Energy    FWHM,error(eV)      E/dE    counts      acf     acf_err
 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 1.47909     22   1.49009  * 13.871  1.286       107.4    1449    0.038940  0.002232  
 1.49056    117   1.49076    8.749   0.638       170.4    2977    0.023579  0.000918  
 1.50356     50   1.48898  * 24.786  5.756        60.1    1641    0.029462  0.001581  
 1.51633     12   NaN      * -NaN    NaN          -NaN     358    0.034503  0.004308  
 1.56034     14   1.55936    5.641   1.086       276.5     196    0.036183  0.005797