multilayer energy peak

[angelicacecilia]

Good afternoon,
I used the function mL.get_Bragg_angle() to calculate the multilayer Bragg angle that corresponds to 8440 eV in the example "Scanning of Double Multilayer Monochromator" available in the gallery of plots and scripts 2. X-ray optics available on adthedocs.io/gallery2.html (the graph is pasted hereafter).
The calculated angle is of 0.9352 deg and it is different from the value depicted in the graph of 0.999 deg, despite the multilayer is the same (same materials, same thickness, same substrate).
Did you apply the refraction correction to the calculated angle to get 0.999deg?

thank you for the help in advance!
Angelica

[kklmn]

This example is in the folder examples/withRaycing/12_Multilayer. You can see there that the Bragg angle is set as
aML.get_Bragg_angle(energy) - aML.get_dtheta_symmetric_Bragg(energy).