Sombrin
Presentation
This model was designed to be particularly precise on the first cross-over energy [Som93]. Implementation is taken from [FBHP16, FBHP20]. It gives the TEEY, and does not take the incidence angle of PEs into account.
Input files
You must provide measured TEEY at normal incidence.
Emission Yield |
Emission energy distribution |
Emission angle distribution |
|
|---|---|---|---|
“True” secondaries |
❌ |
❌ |
❌ |
Elastically backscattered |
❌ |
❌ |
❌ |
Inelastically backscattered |
❌ |
❌ |
❌ |
Total |
✅ |
❌ |
❌ |
Definitions
The TEEY is given by:
\[\sigma(E) = \frac{
2\sigma_\mathrm{max} \left( \frac{E}{E_\mathrm{max}} \right)^{E_\mathrm{param}}
}{
1 + \left( \frac{E}{E_\mathrm{max}} \right)^{2E_\mathrm{param}}
}\]
\(E_\mathrm{param}\) is defined by:
\[E_\mathrm{param} = \frac{
\ln{\left( \sigma_\mathrm{max} - \sqrt{\sigma_\mathrm{max}^2 - 1} \right)}
}{
\ln{\left( \frac{E_\mathrm{c,\,1}}{E_\mathrm{max}}\right)}
}\]
Model parameters
The parameters list is dynamically created here: Sombrin API documentation.