Premium
Observation of Phase change of X‐ray Polarizability by Rocking Curves in the Bragg Case
Author(s) -
Negishi R.,
Fukamachi T.,
Yoshizawa M.,
Zhou S.,
Xu Z.,
Kawamura T.,
Matsumoto I.,
Sakamaki T.,
Nakajima T.
Publication year - 1998
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889897011874
Subject(s) - polarizability , asymmetry , bragg's law , x ray , absorption edge , synchrotron radiation , optics , phase (matter) , enhanced data rates for gsm evolution , absorption (acoustics) , beam (structure) , bragg peak , synchrotron , physics , atomic physics , materials science , molecular physics , condensed matter physics , diffraction , telecommunications , quantum mechanics , molecule , band gap , computer science
Rocking curves of the reflected and transmitted beams for GaAs 600 in the symmetric Bragg case were measured just below the K ‐absorption edge of Ga using X‐rays from synchrotron radiation. Asymmetry and its reversal of the rocking curves for the transmitted beam were observed: the rocking‐curve intensity in the lower‐angle region of the exact Bragg angle was larger than that in the higher‐angle region when the X‐ray energy was 9 eV below the edge, while the asymmetry was reversed when the X‐ray energy was about 6 eV below the edge. The reversal has been found to result from the change in the phase of X‐ray polarizability.