Method for X-ray diffractometry analysis at differing wavelengths without exchanging the X-ray source
A method for performing an X-ray diffractometry analysis of a crystalline and/or amorphous sample, by means of an optical X-ray apparatus having an X-ray source with an X-ray anode constructed from a mixed configuration of at least two metals is characterized in that an energy-dispersive semi-conductor is used for acquiring detector events from the X-rays emanating from the sample, and that X-rays diffracted or scattered by the sample with different characteristic energy lines belonging to the metals of the mixed configuration of the X-ray anode used, are acquired simultaneously during an angle scan. With this method, X-ray diffractometry analysis with multiple characteristic energy lines are possible without any need for conversion or switchover.
1. A method for performing an X-ray diffractometry analysis of a sample using an optical X-ray apparatus, the method comprising the steps of:
a) preparing an X-ray source having an X-ray anode constructed from a mixed configuration of at least two metals, the mixed configuration of the at least two metals comprising a sintered powder mixture;
b) preparing an energy-dispersive semi-conductor detector for acquiring counter events from the X-rays emanating from the sample;
c) directing X-rays emanating from the X-ray source onto a crystalline and/or amorphous sample; and
d) simultaneously acquiring, during an angle scan, X-rays diffracted or scattered by the sample with different characteristic energy lines belonging to the metals of the mixed configuration in the X-ray anode.
2. The method of claim 1 , wherein the characteristic energy lines of both Kα and the Kβ energies of several or of all the metals that are present in the mixed configuration are acquired simultaneously during an angle scan.
3. The method of claim 1 , wherein counter events to be acquired are counted in several ranges that can be freely defined in an energy spectrum by a user.
4. The method of claim 3 , wherein a separate diffractogram is created for each defined range.
5. The method of claim 1 , wherein a mixture ratio of the metals in the X-ray anode is selected such that intensities of measured Kα energy lines are equal.
6. The method of claim 1 , wherein a mixture ratio of the metals in the X-ray anode is selected such that intensities of measured Kα energy lines exhibit a desired intensity ratio.
7. A device for performing the method of claim 1 , the device comprising an optical X-ray apparatus suitable for X-ray diffractometry, an energy-dispersive semi-conductor detector and an X-ray anode constructed from a mixed configuration of at least two metals with different characteristic energy lines, wherein said mixed configuration of said at least two metals comprises a sintered powder mixture.
8. The device of claim 7 , wherein said mixed configuration of said at least two metals is an alloy.
9. The device of claim 7 , wherein said mixed configuration comprises an alternating configuration of strips of at least two pure metals.
10. The device of claim 7 , wherein said mixed configuration of said X-ray anode contains Cu and Co.
11. The device of claim 10 , wherein said mixed configuration of said X-ray anode also contains Cr and/or Fe.
12. The device of claim 10 , wherein said mixed configuration of said X-ray anode also contains molybdenum.
13. The device of claim 11 , wherein said mixed configuration of said X-ray anode also contains molybdenum.
14. The device of claim 7 , wherein said energy-dispersion semi-conductor detector is a single- or multi-dimensional array detector.