[Ifeffit] MoS2 fit

dmc at pdx.edu dmc at pdx.edu
Tue Aug 17 13:24:20 CDT 2004


Hi Mailing list,

      Well, the chief concern I have with my fit now is that I have some 
negative parameters (delr and e0_1):   

Guess parameters +/- uncertainties  (initial guess):

  amp             =     0.7709790   +/-      0.0631820    
  e0              =     1.1165150   +/-      1.0100360    
  delr            =    -0.0106440   +/-      0.0077110     
  ss              =     0.0032510   +/-      0.0005200    
  e0_1            =    -4.6848070   +/-      1.7781210    
  third           =     0.0000370   +/-      0.0001070 

 So, I guess I can drop the third cumulant.

This is a fit using 6 paths (1,2,3,6 are single scatterers)
These are the results this time around:

        Reduced Chi-square          =     410.285252396
        R-factor                    =       0.014599348

As you can see I am still using two e0's, it is still dramatically improving 
the fit.  Without:       Reduced Chi-square     =    1133.485950636
                         R-factor               =       0.044551155

any advice welcomed, Dan 






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