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Harmonic‐free single‐crystal monochromators for neutrons and X‐rays
Author(s) -
Hart M.,
Rodrigues A. R. D.
Publication year - 1978
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/s0021889878013254
Subject(s) - perfect crystal , crystal (programming language) , imperfect , harmonic , silicon , optics , neutron , materials science , single crystal , atomic physics , physics , crystallography , chemistry , optoelectronics , nuclear physics , computer science , bent molecular geometry , quantum mechanics , linguistics , philosophy , programming language , composite material
Comparisons are made between theoretical and actual performance of some novel crystal monochromators. Both perfect and slightly imperfect silicon crystals were used. It is demonstrated that with imperfect crystals and with an intensity loss of only 50% compared with a single perfect crystal, harmonic rejection ratios in excess of 1000 to one can be obtained. Calculations show harmonic rejection ratios of greater than 10 5 to one in perfect crystals.