Differences

This shows you the differences between two versions of the page.

Link to this comparison view

bkg_gsas_f6 [2010/09/17 02:45]
pamwhitfield created
bkg_gsas_f6 [2020/07/16 11:29]
Line 1: Line 1:
-<code topas>'​GSAS background function 6 - GSAS manual page 130 
-'to model rise at low Q (air scatter) and high Q (thermal diffuse scattering) 
-'NOTE Topas will not currently plot this function on the difference plot 
-'P. Whitfield 
-macro Bkg_GSAS_f6(bk1,​ b1v, bk2, b2v, bk3, b3v, bk4, b4v, bk5, b5v, bk6, b6v, bk7, b7v, bk8, b8v, bk9, b9v, bk10, b10v, bk11, b11v, bk12, b12v, bk13, b13v, bk14, b14v, bk15, b15v) 
-{ 
-   prm bk1 b1v  ​ 
-   prm bk2 b2v 
-   prm bk3 b3v  ​ 
-   prm bk4 b4v 
-   prm bk5 b5v  ​ 
-   prm bk6 b6v 
-   prm bk7 b7v  ​ 
-   prm bk8 b8v 
-   prm bk9 b9v 
-   prm bk10 b10v 
-   prm bk11 b11v 
-   prm bk12 b12v 
-   prm bk13 b13v  
-   prm bk14 b14v 
-   prm bk15 b15v  
-   prm Q = 4 Pi Sin(X Deg_on_2) / Lam; 
  
-   ​fit_obj = bk1 + (bk2 Q^2 + bk3/Q^2) + 
- (bk4 Q^4/2 + 2 bk5/Q^4) + 
- (bk6 Q^6/6 + 6 bk7/Q^6) + 
- (bk8 Q^8/24 + 24 bk9/Q^8)+ 
- (bk10 Q^10/120 + 120 bk11/Q^10) + 
- (bk12 Q^12/720 + 720 bk13/Q^12) + 
- (bk14 Q^14/5040 + 5040 bk15/Q^14)  
- ; 
-}</​code>​ 

Personal Tools