core_shell_microgelscostrafo411magnetic_modelticket1257vesicleproductticket_1156ticket_1265_superballticket_822_more_unit_tests
Last change
on this file since 925ad6e was
925ad6e,
checked in by wojciech, 3 years ago

sph_j1c translated to sas_3j1x_x


Property mode set to
100644

File size:
699 bytes

Line  

1  #define INVALID(p) (p.fractal_dim < 0.0) 

2  

3  static double 

4  Iq(double q, 

5  double volfraction, 

6  double radius, 

7  double fractal_dim, 

8  double cor_length, 

9  double sld_block, 

10  double sld_solvent) 

11  { 

12  const double sq = fractal_sq(q, radius, fractal_dim, cor_length); 

13  

14  //calculate P(q) for the spherical subunits 

15  const double V = M_4PI_3*cube(radius); 

16  const double pq = V * square((sld_blocksld_solvent)*sas_3j1x_x(q*radius)); 

17  

18  // scale to units cm1 sr1 (assuming data on absolute scale) 

19  // convert I(1/A) to (1/cm) => 1e8 * I(q) 

20  // convert rho^2 in 10^6 1/A to 1/A => 1e12 * I(q) 

21  // combined: 1e4 * I(q) 

22  

23  return 1.e4 * volfraction * sq * pq; 

24  } 

25  

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