6.2 Further Examples

  The above example is about all there is to running autobk. You may want to add a few more of the parameters listed in chapter 3, but you really shouldn't need too many of them besides rbkg and E0. In any case, here are some more examples with the Cu data, showing how most of the important keywords are used. This one autobk.inp file (named auto2.inp in the uwxafs3.0 distribution) actually has 3 different background removals runs in it. This is a convenient way to test the result of changing particular parameters, and for processing many scans at once.

 %------------------%    autobk.inp     %-------------------%
 title    = Cu 10K, no standard, e0 set to 8980., rbkg =1.5
 data     = cu10k.dat                   % xmu data
 output   = ab-1.dat
 e0       = 8980.0       
 rbkg     = 1.5       
 --------------------
 title    = Cu 50K, w/ standard
 data     = cu50k.dat                
 output   = ab-2.dat
 e0       = 8980.0     fixe0 = true     % don't fit e0 
 standard = cu-feff.chi 
 fixamp   = true                        % fix amp of standard
 rbkg     = 1.5         kweight  = 0  
 --------------------
 title    = Cu 50K, no standard, rbkg =1.5, kw = 1
 data     = cu50k.dat                   % xmu data
 output   = ab-3.dat
 rbkg     = 1.5         kweight  = 1  
 %------------------% end of autobk.inp %-------------------%

Please play with the Cu data until you have a reasonably good feel for how the parameters, and decide what you like best. This should give you an idea of what kinds of inputs are needed for autobk. The next section will have some more concrete suggestions.