Bragg diffraction

Furthermore a lattice strain (g in %) given in Table 1 implies that a distance of D in nm along a direction perpendicular to Bragg plane results in a change in lattice spacing of this percentage.

<N> is the number of unit cells counted in a direction perpendicular to the (hkl) Bragg plane, d is the spacing of the (hkl) planes.

[4] reduced the uncertainty to about 4.7 X [10.sup.-4] by following Scherm's suggestion to insert the sample with its surface parallel to the Bragg planes of the interferometer.

Monomer is converted to polymer by exposure to a standing wave and this forces the droplets to align with the Bragg planes. Different wavelengths can be selected by adjusting the angle of the interfering beams.