Process | HIN: Ionization |
Data type | cross section | uploaded on 2022-12-13 |
Comment | Fit function taken from equation (5). Dat retaed to adf21 and adf22. |
Method | semi-empirical |
Frame | Target |
Columns |
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Ref |
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Data | Download (data from fit) |
Fit Function Details |
\[\sigma_{ion}^{n>1}(E) = 10^{-16}A_1A_9^4 \Bigg[\frac{\tilde{E}^{A_2}e^{-A_3\tilde{E}}}{1 + A_4\tilde{E}^{A_5}} + \frac{A_6e^{\frac{-A_7}{\tilde{E}}} \ln(1+A_8\tilde{E})}{\tilde{E}} \Bigg], \tilde{E} = A_9^2E, A_9 = n\] | ||||||||||||||||||
Python | def h_hin_adas(E, A1, A2, A3, A4, A5, A6, A7, A8, A9): """ This function calculates proton impact ionization cross sections (in cm2) of H n>1. param E: requested proton-impact energy in keV type E: float, np.ndarray param Ai: fit coefficient type Ai: float """ e = E * A9**2 sigma = A9**4*1e-16*A1*(e**A2*np.exp(-A3*e)/(1+A4*e**A5) + A6*np.exp(-A7/e)*np.log(1+A8*e)/e) return sigma |
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Fit Precision | 1.7 % | ||||||||||||||||||
Fit Coefficients |
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x-range | – |