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Results for DC.creator="A." AND DC.creator="G." AND DC.creator="W." AND DC.creator="Leslie" in section 11.2.5 of volume F |
The effect of instrument or detector errors
International Tables for Crystallography (2012). Vol. F, Section 11.2.5.3, p. 268 [ doi:10.1107/97809553602060000831 ]
... be in the range 0.002-0.003. An experiment in which a diffraction spot recorded on photographic film was scanned many times ... positioning the reading head, due to vibration or mechanical defects. A simple model for the instrumental contribution to the standard deviation ... spot peak: where is the average gradient and K is a proportionality constant. Taking a triangular reflection profile, the gradient ...
Evaluating the integrated intensity and standard deviation
International Tables for Crystallography (2012). Vol. F, Section 11.2.5.2, pp. 267-268 [ doi:10.1107/97809553602060000831 ]
Evaluating the integrated intensity and standard deviation 11.2.5.2. Evaluating the integrated intensity and standard deviation The summation integration intensity is given by where the summation is over the m pixels in the peak region of the measurement box. If the peak region has mm symmetry, this simplifies to To evaluate the ...
Outlier rejection
International Tables for Crystallography (2012). Vol. F, Section 11.2.5.1.1, p. 267 [ doi:10.1107/97809553602060000831 ]
... the crystal of interest. Possible causes are the presence of a satellite crystal or twin component, white-radiation streaks, cosmic rays ... algorithm is employed: (1) Determine the background plane constants using a fraction (say 80%) of the background pixels, selecting those with ... found, re-determine the plane constants. The rationale for using a subset of the pixels with the lowest pixel values ...
Determination of the best background plane
International Tables for Crystallography (2012). Vol. F, Section 11.2.5.1, p. 267 [ doi:10.1107/97809553602060000831 ]
... Determination of the best background plane The background plane constants a, b, c are determined by minimizing where is the total ... and the summation is over the n background pixels. is a weight which should ideally be the inverse of the variance ... the variance is determined by counting statistics, this gives where G is the gain of detector, which converts pixel counts ...
Integration by simple summation
International Tables for Crystallography (2012). Vol. F, Section 11.2.5, pp. 267-268 [ doi:10.1107/97809553602060000831 ]
... Determination of the best background plane | | The background plane constants a, b, c are determined by minimizing where is the total ... and the summation is over the n background pixels. is a weight which should ideally be the inverse of the variance ... the variance is determined by counting statistics, this gives where G is the gain of detector, which converts pixel counts ...
International Tables for Crystallography (2012). Vol. F, Section 11.2.5.3, p. 268 [ doi:10.1107/97809553602060000831 ]
... be in the range 0.002-0.003. An experiment in which a diffraction spot recorded on photographic film was scanned many times ... positioning the reading head, due to vibration or mechanical defects. A simple model for the instrumental contribution to the standard deviation ... spot peak: where is the average gradient and K is a proportionality constant. Taking a triangular reflection profile, the gradient ...
Evaluating the integrated intensity and standard deviation
International Tables for Crystallography (2012). Vol. F, Section 11.2.5.2, pp. 267-268 [ doi:10.1107/97809553602060000831 ]
Evaluating the integrated intensity and standard deviation 11.2.5.2. Evaluating the integrated intensity and standard deviation The summation integration intensity is given by where the summation is over the m pixels in the peak region of the measurement box. If the peak region has mm symmetry, this simplifies to To evaluate the ...
Outlier rejection
International Tables for Crystallography (2012). Vol. F, Section 11.2.5.1.1, p. 267 [ doi:10.1107/97809553602060000831 ]
... the crystal of interest. Possible causes are the presence of a satellite crystal or twin component, white-radiation streaks, cosmic rays ... algorithm is employed: (1) Determine the background plane constants using a fraction (say 80%) of the background pixels, selecting those with ... found, re-determine the plane constants. The rationale for using a subset of the pixels with the lowest pixel values ...
Determination of the best background plane
International Tables for Crystallography (2012). Vol. F, Section 11.2.5.1, p. 267 [ doi:10.1107/97809553602060000831 ]
... Determination of the best background plane The background plane constants a, b, c are determined by minimizing where is the total ... and the summation is over the n background pixels. is a weight which should ideally be the inverse of the variance ... the variance is determined by counting statistics, this gives where G is the gain of detector, which converts pixel counts ...
Integration by simple summation
International Tables for Crystallography (2012). Vol. F, Section 11.2.5, pp. 267-268 [ doi:10.1107/97809553602060000831 ]
... Determination of the best background plane | | The background plane constants a, b, c are determined by minimizing where is the total ... and the summation is over the n background pixels. is a weight which should ideally be the inverse of the variance ... the variance is determined by counting statistics, this gives where G is the gain of detector, which converts pixel counts ...
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