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--- dac_abs_correction [2014/04/25 07:16] – martin_fisch
+++ dac_abs_correction [2025/09/19 15:18] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+====== DAC_Abs_Correction ======
+Description: Absorption correction for diamond anvil cell data. Corrects intensity decrease with increasing 2-Theta due to longer beam paths through diamonds.
+Comment: Actually not a macro, the structure of diamond in included with a scale factor of zero to calculate the correct value for u_per_cm_diamond for any given wavelength.
+Contributed by: Martin Fisch
+<code topas>
+scale_pks = Exp( - u_per_cm_diamond * ( 1 - 1/Cos(Deg * 2 * Th)));
+str
+phase_name "Diamond"
+Cubic(3.56672)
+scale 0
+space_group "Fd-3mS"
+prm u_per_cm_diamond = (Get(phase_MAC) * 1.6605402 Get(cell_mass) / Get(cell_volume));: 0
+site C x 0 y 0 z 0 occ C 1 beq 1
+</code>