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ThermalNeutronBk2BkExpBeta
Description
ThermalNeutronBk2BkExpBeta is a function to calculate \(\beta(d_h)\) of ThermalNeutronBk2BkExpConvPVoigt.
It is defined as
\[\beta(d_h) = \left(n\beta_0 + \beta_1 d_h + (1-n)\beta_0^t - \frac{\beta_1^t}{d_h}\right)^{-1}\]
where
\[n = \frac{1}{2} \mathit{erfc}(\text{Width}(t_\text{cross} - d^{-1}))\]
and
\[erfc(x) = 1-erf(x) = 1-\frac{2}{\sqrt{\pi}}\int_0^xe^{-u^2}du.\]
Properties (fitting parameters)
| Name |
Default |
Description |
|---|
| Width |
1.0 |
|
| Tcross |
1.0 |
|
| Beta0 |
0.0 |
|
| Beta1 |
0.0 |
|
| Beta0t |
0.0 |
|
| Beta1t |
0.0 |
|
Categories: FitFunctions | General
