Abstract

Coherence phenomena of neutron waves have been investigated by means of perfect crystal interferometry. A perfect silicon phase shifter was used to obtain information on the longitudinal and transverse coherence lengths and to observe the strong variation of the phase shift near a Bragg direction. Interference experiments with pulsed beams displayed properties of the relative wave packet, and the self-interference character of experiments of this kind. Experiments with an absorber-detector in one coherent beam gave information about the unsharp particle-wave behaviour of neutrons.

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