| 1 | # information to be shown to users about new GSAS-II versions (also |
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| 2 | # update GSASIIctrlGUI.updateNoticeDict). Lines starting with "#" are |
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| 3 | # comments. |
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| 4 | # Each version should be tagged with a version number and a colon. All subsequent text |
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| 5 | # will be part of the the notice for that version. Separate versions |
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| 6 | # with one or more blank lines between. Note that line breaks and |
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| 7 | # indentation are ignored. Use && to insert a single "&" |
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| 8 | # character. Use %% to insert a new line. |
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| 9 | |
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| 10 | 4919: With this version of GSAS-II, the profile functions have been changed to account for possible variation in the powder |
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| 11 | pattern step size across the scan. This will likely change the histogram scale factor (see Sample Parameters), peak |
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| 12 | intensities (see Peak List) and background peak intensities (see |
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| 13 | Background). %%%%If you choose to repeat the refinement for |
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| 14 | this project, you may need to turn off the parameters affecting |
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| 15 | peak shape for an initial refinement. It should converge quickly to the new scale factor. |
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| 16 | %%%%For Constant Wavelength data, the scale factor, etc. will change |
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| 17 | by a factor related to the pattern step size, e.g. for 11-BM data with a step size of 0.001 deg. 2-theta the new scale factor will be |
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| 18 | ~0.1 times the old one. |
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| 19 | For TOF data there may be similar changes to the scale factor && |
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| 20 | peak intensities, as noted above. |
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| 21 | Significant improvement in profile residuals have been observed in some cases with these new functions. |
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| 22 | This change is of no consequence for single crystal, small angle or |
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| 23 | reflectometry data in GSAS-II. |
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| 24 | |
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