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Hello GSAS-II users, Apologies if this is well-known; I have looked for the answer. Is there a way to use a source spectrum that includes K-beta? Equivalently, how can I fit to diffraction data that includes all of Ká1, Ká2, and Kâ lines? More</div>
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<p class="MsoNormal">Hello GSAS-II users,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Apologies if this is well-known; I have looked for the answer.<o:p></o:p></p>
<p class="MsoNormal">Is there a way to use a source spectrum that includes K-beta?<o:p></o:p></p>
<p class="MsoNormal">Equivalently, how can I fit to diffraction data that includes all of Ká1, Ká2, and Kâ lines?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">More generally, can I use a customized source spectrum that includes more lines than the traditional Ká1 and Ká2 lines? I wish to apply some of the very accurate models of the Ká spectrum (that include not only Ká-1 and -2, but also -3,
-4 etc.) to the source spectrum description used by GSAS-II? And then extend this to using the analogous full description of the Kâ spectrum?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Motivation: Not just for use when a â filter is not thick enough – I want to measure lattice parameter of some simple metals (BCC, FCC) as accurately as possible. By using an Si SRM lightly sprinkled on top, I get something like an internal
standard and still mostly non-overlapping peaks without a beta filter. The additional peaks enable greater accuracy (with the “internal” standard and modeling the source spectrum more completely and accurately) and precision (using more peaks).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thank you very much,<span style="mso-ligatures:none"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Calligraphy"">William Boyer<o:p></o:p></span></p>
<p class="MsoNormal"><>< ><><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Calibri Light",sans-serif">Materials Scientist, PhD<o:p></o:p></span></p>
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