Diffraction of X-rays in Bent Crystals, Kinematic Theory for the Case of Transmission PDF Download
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Author: I. B. Borovsky
Publisher:
ISBN:
Category : Crystals
Languages : en
Pages : 6
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Book Description
Author: I. B. Borovsky
Publisher:
ISBN:
Category : Crystals
Languages : en
Pages : 6
Get Book Here
Book Description
Author: I. B. Borovsky
Publisher:
ISBN:
Category : Crystals
Languages : en
Pages : 4
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Book Description
Author: I. B. Borovsky
Publisher:
ISBN:
Category : Crystals
Languages : en
Pages : 6
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Book Description
Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1308
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Book Description
Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 818
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 542
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Book Description
Author: Hans Ekstein
Publisher:
ISBN:
Category : X-rays
Languages : en
Pages : 14
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Book Description
A bent crystal lamella may be assumed to consist of individual irregularly shaped blocks having mutual angular disorientation or to be regular in structure except for plastic deformation. The blockes were assumed to be of such a size that the kinematic theory would be valid. X-ray integrated intensity was calculated in the first case by adding the intensities of the individual blocks and in the second case by adding the amplitudes. Theoretical analysis indicated that, in both cases, moderate bending is not expected to change the integrated intensity or to cause broadening of the Debye-Scherrer lines.
Author:
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ISBN:
Category :
Languages : en
Pages : 14
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Book Description
It is well known that the peak reflectivity of a bent crystal, generally speaking, is smaller than that of a plane crystal, and it goes to zero when the crystal curvature goes to infinity. The reason for this is the transition between dynamical and kinematical diffraction that takes place as the crystal curvature increases. The physical explanation is as follows: the deviation from exact Bragg position along the beam changes so fast that the thickness over which the beam is within a Darwin width becomes too small to reflect the beam. Bent crystals are widely used as focusing elements in X-ray optics, and estimation of whether or not a bent crystal is still perfect enough to provide good reflectivity is of great importance. Currently the Advanced Photon Source (APS) is considering a number of bent crystals as focusing elements for future APS beamlines, including a sagittaly focusing monochromator and bent backscattering analyzer for inelastic X-ray scattering experiments. A criterion is given in answer to the question: To what extent is it possible to bend a crystal without loss of X-ray peak reflectivity? An expression based on the work of Chukhovskii, Gabrielyan and Petrashen, is formulated that applies to anisotropic cubic crystal and that can be used not only for conventional asymmetric Bragg diffraction, but also for inclined crystal diffraction. The following special cases are treated as examples: isotropic crystal, standard symmetrical Bragg diffraction, extremely asymmetric diffraction, and backscattering with Bragg angles near 90°. In addition, an asymptotic behavior for high energies is detailed.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 42
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Book Description
Author: A. Guinier
Publisher: Courier Corporation
ISBN: 0486141349
Category : Science
Languages : en
Pages : 404
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Book Description
Exploration of fundamentals of x-ray diffraction theory using Fourier transforms applies general results to various atomic structures, amorphous bodies, crystals, and imperfect crystals. 154 illustrations. 1963 edition.
