The thickness (twice 1. moment) of the PB calculates to 524.2621321988262 A. The profile description is:
Parameter:    'scale'    , value=0.908017 +/- 0.00301, bounds=[0.8, 1.5]
Parameter:     'bkg'     , value=1.43504e-06 +/- 2.43e-07, bounds=[1e-08, 5e-05]
Parameter:'sio2 - volfrac solvent', value=0.0850438 +/- 0.0161, bounds=[0.0, 0.1]
Parameter:'polymer - thick', value=16.9664  +/- 3.2 , bounds=[1.0, 50.0]
Parameter:'polymer - rough', value=1.95038 +/- 1.11 , bounds=[0.05, 6.0]
Parameter:'polymer - volfrac solvent', value=0.129523 +/- 0.0117, bounds=[0.0, 0.4]
Parameter:'freeform vfp - spline dzf[0]', value=0.00381947 +/- 0.00263, bounds=[0.001, 0.24285714285714285]
Parameter:'freeform vfp - spline dzf[1]', value=0.0451247 +/- 0.0245, bounds=[0.01, 0.24285714285714285]
Parameter:'freeform vfp - spline dzf[2]', value=0.0925236 +/- 0.0408, bounds=[0.01, 0.24285714285714285]
Parameter:'freeform vfp - spline dzf[3]', value=0.0293669 +/- 0.00894, bounds=[0.01, 0.24285714285714285]
Parameter:'freeform vfp - spline dzf[4]', value=0.219683 +/- 0.042, bounds=[0.01, 0.24285714285714285]
Parameter:'freeform vfp - spline dzf[5]', value=0.0186154 +/- 0.00219, bounds=[0.01, 0.24285714285714285]
Parameter:'freeform vfp - spline vff[0]', value=0.717105 +/- 0.0122, bounds=[0.01, 1.0]
Parameter:'freeform vfp - spline vff[1]', value=0.764688 +/- 0.0267, bounds=[0.01, 1.0]
Parameter:'freeform vfp - spline vff[2]', value=0.0377908 +/- 0.0101, bounds=[0.01, 1.0]
Parameter:'freeform vfp - spline vff[3]', value=0.291518 +/- 0.0611, bounds=[0.01, 1.0]
Parameter:'freeform vfp - spline vff[4]', value=0.167499 +/- 0.115, bounds=[0.01, 1.0]
Parameter:'solvent - sld', value=6.13618 +/- 0.00458, bounds=[6.0, 6.4]
