Polarizing supermirror

Composition: 54FeFe/Al on Si
Critical angle: 2.8 mrad/Å
Reflectivity at the critical angle: 0.8
Dimensions of coated area: 80x80 mm2
Thickness of substrates: ≥0.1 mm

The neutron reflectivity R+ and polarizing efficiency P as a function of the momentum transfer q for a polarizing 54FeFe/Al supermirror on the Si substrate. Reflection through silicon