| Process | HEX: Excitation |
| Data type | cross section | uploaded on 2023-02-08 |
| Comment | Fit function taken from p56. Error: E<0.5keV/u -> 100%, 0.5keV/u<E<5keV/u -> 50%, 5keV/u<E<25keV/u -> 30%, 25keV/u<E<300keV/u -> 20%, E<300keV/u -> 10% |
| Method | semi-empirical |
| Frame | Target |
| Columns |
|
| Ref |
|
| Data | Download (data from fit) |
| Fit Function Details |
\[\sigma_{ex}^{2\rightarrow 3,4,5}(E) =10^{-16}A_1 \Bigg[\frac{e^{-\frac{A_2}{E}}\ln(1+A_3E)}{E} + \frac{A_4e^{-A_5E}}{E^{A_6}}\Bigg]\] | ||||||||||||
| Python | def h_hex_janev_25(E, A1, A2, A3, A4, A5, A6):
"""
This function calculates proton impact excitation cross sections (in cm2) of
H n=2 to n=3,4,5 and n=3 to n=4,5,6 and He+2 of H n=2 to n=3,4,5 and n=3 to n=4,5,6.
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)
return sigma |
||||||||||||
| Fit Precision | 1.7 % | ||||||||||||
| Fit Coefficients |
|
||||||||||||
| x-range | – |