h_hin_javen_he
Fit Function | \[\sigma_{ion}^{1,2,3}(E) =10^{-16}A_1 \Bigg[\frac{e^{-\frac{A_2}{E}}\ln(1+A_3E)}{E} + \frac{A_4e^{-A_5E}}{E^{A_6} + A_7E^{A_8}}\Bigg]\] |
Comments | Python code requires NumPy imported as `np`. |
Arguments |
|
||||||||||||||||||||||||||||||||||||||||
Return values |
|
||||||||||||||||||||||||||||||||||||||||
Code | def h_hin_javen_he(E, A1, A2, A3, A4, A5, A6, A7, A8): """ This function calculates He+2 impact ionzation cross sections (in cm2) of H n=1,2 and 3. param E: requested impact energy in keV/u type E: float, np.ndarray param Ai: fit coefficient type Ai: float """ sigma = 1e-16 * A1 * (np.exp(-A2/E) * np.log(1 + A3*E) / E + A4*np.exp(-A5*E)/ (E**A6 + A7*E**A8)) return sigma |