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The results of a new experiment on neutron diffraction by surface acoustic waves are presented. The measurements were carried out at a fixed incident angle in the time-of-flight mode, which made it possible to study the diffraction pattern in a wide range of neutron wavelengths at surface acoustic wave frequencies from 35 to 117 MHz. In a number of cases, diffracted waves of not only the first but also the second order were observed. The measurement results of both the angular distribution of diffracted waves and their amplitudes are in satisfactory agreement with the calculations. A new estimation has been obtained for the range of applicability of the dispersion law of neutron waves in matter moving with large acceleration.
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; Frank, A. I. 1 ; Rebrova, N. V. 2 ; Zakharov, M. A. 1 ; Gutfreund, P. 3 ; Khaydukov, Yu. N. 4 ; Ortega, L. 5 ; Roshchupkin, D. V. 6 ; Goray, L. I. 7 1 Joint Institute for Nuclear Research, Dubna, Russia (GRID:grid.33762.33) (ISNI:0000 0004 0620 4119); State University Dubna, Dubna, Russia (GRID:grid.440621.5)
2 Joint Institute for Nuclear Research, Dubna, Russia (GRID:grid.33762.33) (ISNI:0000 0004 0620 4119)
3 Institut Laue-Langevin, Grenoble, France (GRID:grid.156520.5) (ISNI:0000 0004 0647 2236)
4 Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany (GRID:grid.419552.e) (ISNI:0000 0001 1015 6736); Max Planck Society Outstation at the MLZ, Garching, Germany (GRID:grid.4372.2) (ISNI:0000 0001 2105 1091)
5 Université Paris-Sud, CNRS, Laboratoire de Physique des Solides, Orsay, France (GRID:grid.5842.b) (ISNI:0000 0001 2171 2558)
6 Institute of Microelectronics Technology and High-Purity Materials Russian Academy of Sciences, Chernogolovka, Russia (GRID:grid.425037.7) (ISNI:0000 0004 0638 3022)
7 Alferov University, St. Petersburg, Russia (GRID:grid.35135.31) (ISNI:0000 0004 0543 3622); Institute for Analytical Instrumentation, St. Petersburg, Russia (GRID:grid.434964.8) (ISNI:0000 0004 0404 7180); Saint Petersburg Electrotechnical University “LETI”, St. Petersburg, Russia (GRID:grid.9905.5) (ISNI:0000 0001 0616 2244)