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# Lorentz¶

## Description¶

The Ornstein-Zernicke model is defined as:

$I(q) = I_0 / (1 + q^2L^2) + background$

where: - $$I_0$$ is a scale factor - $$L$$ is the screening length - $$background$$ is the background level

## Properties (fitting parameters)¶

Name

Default

Description

Scale

1.0

Scale

Length

50.0

Length

Background

0.0

Background

Categories: FitFunctions | SANS

## Source¶

Python: Lorentz.py