h_hex_janev_1n
Fit Function | \[\sigma_{ex}^{1\rightarrow n>6}(E) =\bigg(\frac{6}{A_9}\bigg)^310^{-16}A_1 \Bigg[\frac{e^{-\frac{A_2}{E}}\ln(1+A_3E)}{E} + \frac{A_4e^{-A_5E}}{E^{A_6} + A_7E^{A_8}}\Bigg]\] |
Comments | Python code requires NumPy imported as `np`. |
Arguments |
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Return values |
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Code | def h_hex_janev_1n(E, A1, A2, A3, A4, A5, A6, A7, A8, A9): """ This function calculates proton impact excitation cross sections (in cm2) of H n=1 to n>6 and He+2 of H n=1 to n>6 param E: requested impact energy in keV/u type E: float, np.ndarray param Ai: fit coefficient type Ai: float """ sigma = (6/A9)**3 * 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 |