|- - peak - -|   | - - - fit - - - - - - |                ROI
  Energy  counts   Energy    FWHM,error(eV)      E/dE    counts      acf     acf_err
 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 1.00869     10   1.00862    0.888   0.312      1135.4      72    0.058256  0.016450  
 1.02168     15   1.02175    0.915   0.124      1116.1     119    0.068710  0.014013  
 1.47285     12   1.47237    2.242   0.334       656.8     119    0.057552  0.011766  
 1.86447     13   1.86438    3.162   0.552       589.6     102    0.067666  0.015323  
 2.00706     11   2.00555    3.992   0.719       502.3     102    0.063822  0.014228