Multiple diffraction in the kinematical approach.

نویسنده

  • Elisabeth Rossmanith
چکیده

The expressions derived for the calculation of multiple diffraction patterns for a perfect crystal in the framework of the kinematical theory are compared with the relevant result of the kinematical power-transfer equation deduced for a mosaic crystal. It is shown that the results of the two concepts differ appreciably.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Rapid structure determination of a metal oxide from pseudo-kinematical electron diffraction data.

The electron precession diffraction technique is employed to provide quasi-kinematical data for determination of atom positions in the (Ga,In)2SnO5m-phase. Precession data are compared with conventional diffraction data captured under identical conditions and show a distinct superiority because they exhibit kinematical characteristics in the structure-defining reflections. Precessed data are no...

متن کامل

Efficient kinematical simulation of reflection high-energy electron diffraction streak patterns for crystal surfaces

An efficient program with a user-friendly graphical interface has been developed for simulating reflection high-energy electron diffraction patterns obtained on crystal surfaces. The calculations are based on a kinematical approach which considers single electron scattering events at the surface. This time-efficient approach is in most cases sensitive enough for distinguishing different structu...

متن کامل

Kinematical multiple diffraction: the width of psi-scan intensity profiles.

It was shown in Rossmanith [Acta Cryst. (1992), A48, 596-610] that the peak width of intensity profiles of multiple diffraction events can be calculated in a simple manner from the divergence delta and the wavelength spread Deltalambda/lambda of the incident beam and from the mosaic spread eta and the magnitude r of the ideally perfect crystallites in the sample. In the present paper, an improv...

متن کامل

Statistical dynamical direct methods. I. The effective kinematical approximation

While it is known that the kinematical approximation works poorly if at all for transmission electron diffraction, substantial success has been achieved over the last few years in applying it via direct methods to determine atomic structures. This raises an interesting quandary; is the established theory of electron diffraction wrong, or are the apparent successes mirages? The intention of this...

متن کامل

X-ray Multiple-wave Diffraction Anomalous Fine Structure

Multiple-wave Diffraction Anomalous Fine Structure (MDAFS), a new method combining the X-ray multiple-wave diffraction with diffraction anomalous fine structure (DAFS) technique, provides the long-range order structure information by measuring the multiple-wave diffraction profiles in the vicinity of an absorption edge. The real part of dispersion correction and fine structure function can be o...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Acta crystallographica. Section A, Foundations of crystallography

دوره 62 Pt 3  شماره 

صفحات  -

تاریخ انتشار 2006