A Calculation of the Neutron (111,111/220) Three Beam Case*
نویسنده
چکیده
After the development of a very common formalism for neutron three beam cases, a detailed investigation is given for the case (111, 111/220) and a comparisation with the (different) case (111, 111/200) is presented. It is shown that the former case behaves different by concerning dispersion branches and reflection curves; both are asymmetric in respect to a wave incident in the exact Bragg direction and react more sensitive by upon small deviations of the incident wave from this direction. Simple formulae were found for the reflection curves of the intensities for all three beams behind a perfect crystal slab and the Pendellösung period.
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