[ Identification | Description | Input parameters | Links ]
IncoherentPhonon_process ComponentPart of the Union components, a set of components that work together and thus expects geometry and physics within McStas. The use of this component requires other components to be used. 1) One specifies a number of processes using process components like this one 2) These are gathered into material definitions using Union_make_material 3) Geometries are placed using Union_box / Union_cylinder, assigned a material 4) A Union_master component placed after all of the above Algorithm: Described elsewhere, see e.g. https://doi.org/10.3233/JNR-190117
| Name | Unit | Description | Default | |
| T | K | Temperature | 394 | |
| density | g/cm3 | Material density | 6.0 | |
| M | amu | ion mass | 50.94 | |
| sigmaCoh | barns | Coherent scattering cross section | 0.0184 | |
| sigmaInc | barns | Incoherent scattering cross section | 5.08 | |
| dosfn | string | Path to the file that contains the DoS | NULL | |
| nphe_exact | 1 | Number of terms in the phonon expansion taken exact. Has to be between 1 and 3. | 1 | |
| nphe_approx | 1 | Number of terms in the phonon expansion taken approximate. | 0 | |
| approx | 1 | Approximation type: 0 gaussian, 1 saddle point | 0 | |
| mph_resum | 1 | Resumate the remaining terms of the phonon expansion via a saddle point: 0 No, 1 Yes | 0 | |
| nxs | 1 | Number of energy points at which the total cross sections are precomputed | 1000 | |
| kabsmin | A^-1 | Lower cut-off for the neutron wave-vector k | 0.1 | |
| kabsmax | A^-1 | Higher cut-off for the neutron wave-vector k | 25 | |
| interact_fraction | 1 | How large a part of the scattering events should use this process 0-1 (sum of all processes in material = 1) | -1 |
| AT ( | , | , | ) RELATIVE | |||
|---|---|---|---|---|---|---|
| ROTATED ( | , | , | ) RELATIVE |
IncoherentPhonon_process.comp.
[ Identification | Description | Input parameters | Links ]
Generated on 2025-05-08 13:31:31