Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53421#.VMG9WCzQrzE Author(s) E. Raitman 1* , V. Gavrilov 1 , D. Mjasischev 1 , Ju. Ekmanis 1 , A. Hoser 2 , T. Hoffmann 2 Affiliation(s) 1 Institute of Physical Energetics, Riga, Latvia . 2 Helmholtz-Zentrum, BENSC, Berlin, Germany . ABSTRACT In this research project, we measured and analyzed the spatial distribution of neutron beam Bragg diffracted from the front- and back-faces of thin Si single crystal undergoing on ultrasound excitation. For the perfect crystal, it is shown that when the acoustic wave amplitude is increased, the front-face peak position remains unchanged and its value grows linearly. The values of ultrasound wave amplitude were determined. The back-face peak becomes asymmetric and tends to disappear. New types of Pendellosung fringes in the center of the diffraction profiles were observed at the first time. It is su...
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