Theoretical study of the properties of X-ray diffraction moiré fringes. II. Illustration of angularly integrated moiré images

Yoshimura, J.

doi:10.1107/S2053273319004601

Figure 11
Plots of the mean intensity of moiré images [ $[{R_{og'}}(x ) + {R_{gg'}}(x )]$ ] versus the mid deviation angle $[\Delta {\theta _{\rm m}}]$ . Numerical conditions for the computation are as follows: curve (A) t₁ = t₂ = 0.8, $[\Delta\Theta_{\rm inc}]$ = 0.5′′, s₂ = 0; (B) t₁ = t₂ = 0.8, $[\Delta\Theta_{\rm inc}]$ = 0.5′′; (C) t₁ = t₂ = 0.8, $[\Delta\Theta_{\rm inc}]$ = 1.2′′; (D) t₁ = t₂ = 0.8, $[\Delta\Theta_{\rm inc}]$ = 2.0′′; (E) t₁ = t₂ = 1.5, $[\Delta\Theta_{\rm inc}]$ = 0.36′′; (F) t₁ = t₂ = 1.5, $[\Delta\Theta_{\rm inc}]$ = 0.9′′; (G) t₁ = t₂ = 1.5, $[\Delta\Theta_{\rm inc}]$ = 2.0′′; (H) t₁ = t₂ = 2.5, $[\Delta\Theta_{\rm inc}]$ = 0.9′′; (I) t₁ = t₂ = 2.5, $[\Delta\Theta_{\rm inc}]$ = 2.0′′; (J) t₁ = t₂ = 2.5, $[\Delta\Theta_{\rm inc}]$ = 4.0′′. The curvature strength of the rear crystal was s₂ = 0.045′′ mm⁻¹ for all the curves from (B) to (J). The half widths (FWHM) of these intensity curves are: 2.18′′, 2.15′′, 2.55′′ and 2.79′′ in curves (A), (B), (C) and (D), respectively; 1.42′′, 1.57′′, 2.27′′ in curves (E), (F) and (G), respectively; 1.06′′, 2.09′′, 4.01′′ in curves (H), (I) and (J), respectively.

FOUNDATIONS
ADVANCES

ISSN: 2053-2733

Volume 75| Part 4| July 2019| Pages 610-623

https://doi.org/10.1107/S2053273319004601

Open

access

Search IUCr Journals		doi		Advanced search
Author		volume	page