Fit model: core-shell cylinder B (size distribution on shell thickness)

Parameters:

parameter |
description |

F_scal |
scaling parameter (should be between 0.1 and 10 - see here) |

F_cont_core |
contrast core (see here) |

F_cont_shell |
contrast shell (see here) |

F_rad_core |
core radius |

F_sigma |
polydispersity index [0,1] on SHELL thickness |

F_thick_shell |
shell thickness |

F_height |
cylinder length |

S_phi |
volume fraction |

Remarks:

the checkbox "capped" allows to choose between the model with and without capped corners

the model performs a single numerical integration to take into account for the size distribution;

the averaging for different orientations of the cylinders is done by averaging 150 models with continuously varying orientation between 0 and 90 deg

a Gaussian size distribution is used by default

References:

Pedersen J.S., Adv. Colloid Interface Sci. 70, 171 (1997)