power_law¶
Simple power law with a flat background
Parameter |
Description |
Units |
Default value |
---|---|---|---|
scale |
Scale factor or Volume fraction |
None |
1 |
background |
Source background |
cm-1 |
0.001 |
power |
Power law exponent |
None |
4 |
The returned value is scaled to units of cm-1 sr-1, absolute scale.
This model calculates a simple power law with a flat background.
Definition
\[I(q) = \text{scale} \cdot q^{-\text{power}} + \text{background}\]
Note the minus sign in front of the exponent. The exponent power should therefore be entered as a positive number for fitting.
Also note that unlike many other models, scale in this model is NOT explicitly related to a volume fraction. Be careful if combining this model with other models.
Source
References
None.
Authorship and Verification
Author:
Last Modified by:
Last Reviewed by: