Spherical-Wave Neutron Propagation and Pendellösung Fringe Structure in Silicon
- 25 September 1972
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 29 (13), 871-874
- https://doi.org/10.1103/physrevlett.29.871
Abstract
We have studied neutron Pendellösung fringe patterns within the Bragg reflection from perfect silicon crystals. The patterns as obtained with a full-spectrum incident beam show that the coherent wave front of the neutron radiation must be considered as spherical rather than planar, and also that the crystals under study possess a uniformly curved distortion. The extended fringe patterns permit a precision determination of the coherent nuclear scattering amplitude for silicon of 0.41491(10)×10−12 cm per nucleus.Keywords
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