|- - peak - -|   | - - - fit - - - - - - |                ROI
  Energy  counts   Energy    FWHM,error(eV)      E/dE    counts      acf     acf_err
 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 0.825329    20   0.825375   0.687   0.081      1201.4     145    0.063496  0.012262  
 1.02165     12   1.02146    1.171   0.187       872.6     117    0.059391  0.012223  
 1.33018     11   1.33010    1.352   0.330       984.1      81    0.059899  0.015919  
 1.35103     10   1.35103    1.579   0.271       855.4     119    0.047101  0.009686