openmc.data.CoherentElasticAE¶
- class openmc.data.CoherentElasticAE(coherent_xs)[source]¶
Differential cross section for coherent elastic scattering
The differential cross section for coherent elastic scattering from a powdered crystalline material may be represented as:
\[\frac{d^2\sigma}{dE'd\Omega} (E\rightarrow E',\mu,T) = \frac{1}{E} \sum \limits_{i=1}^{E_i < E} s_i(T) \delta(\mu - \mu_i) \delta (E - E') /(2\pi) \]where \(E_i\) are the energies of the Bragg edges in [eV], \(s_i(T)\) is the structure factor in [eV-b] at the moderator temperature \(T\) in [K], and \(\mu_i = 1 - 2E_i/E\).
- Parameters
coherent_xs (openmc.data.CoherentElastic) – Coherent elastic scattering cross section
- Variables
coherent_xs (openmc.data.CoherentElastic) – Coherent elastic scattering cross section