Interference Phenomena of Slow Neutrons

摘要: Various experiments involving interference of slow neutrons have been performed in order to determine the phase scattered neutron wave with respect primary wave. Theoretically this change is very close either 0\ifmmode^\circ\else\textdegree\fi{} or 180\ifmmode^\circ\else\textdegree\fi{}. The show that few exceptions latter case. evidence based on following types measurements: (a) measurement intensities Bragg reflection various orders many crystals, and comparison theoretical values form factor; (b) total scattering cross section gas molecules for wave-lengths long compared molecular dimensions; (c) determination limiting angles mirrors. elements Ba, Be, C, Ca, Cu, F, Fe, Mg, N, Ni, O, Pb, S, Zn were found scatter 180\ifmmode^\circ\else\textdegree\fi{} difference; Li probably Mn zero difference. five I, Br, Cl, K, Na behave alike which they tentatively identified as Coherent sections determined several elements.