DataSet D107481

\[\mathrm{H}^{+} + \mathrm{Li} \; 2s \rightarrow \mathrm{Li} \; 4s + \mathrm{H}^{+}\]

Process HEX: Excitation
Data type cross section | uploaded on 2022-11-11
Comment Using AOCC64_65 to compute cross-section data. Fit function in equation (3) from Schweinzer et al.
MethodAOCC: Atomic‐orbital close‐coupling
FrameTarget
Columns
  1. E /eV u-1
  2. sigma /cm2
Uncertainty10 %
Ref
  • B19: J. Schweinzer, R. Brandenburg, I. Bray, R. Hoekstra, F. Aumayr, R. K. Janev, H. P. Winter, "Database for inelastic collisions of lithium atoms with electrons, protons, and multiply charged ions", Atomic Data and Nuclear Data Tables 72, 239-273 (1999). [10.1006/adnd.1999.0815]
DataDownload (data from fit)

Fitted Data

Fit Function
Details		 \[\sigma_{H^+}^{TX}\big(E\big) = 10^{-16}A_1 \Bigg\{ \frac{e^{-A_2/E}(A_{12} + \ln(A_{11}+A_3E))}{E}+ A_4\frac{e^{-A_5E}}{E^{A_6}} + A_7\frac{e^{-A_8E}}{1+A_9E^{A_{10}}}\Bigg\}\]
Python 
def li_hex_schweinzer(E, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12):
    """
    This function calculates proton impact excitation cross sections (in cm2) of 
    Li.
    param E: requested proton-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)*(A12 + np.log(A11+ A3*E)))/E + 
                        A4*np.exp(-A5*E)/E**A6 + A7*np.exp(-A8/E)/(1+A9*E**A10))
Fit Precision2.0 %
Fit Coefficients 
A1
 1.466e+00
A2
 1.632e+01
A3
 1.782e+00
A4
 4.382e-01
A5
 4.259e-01
A6
-1.367e+00
A7
-8.031e-01
A8
 1.076e+00
A9
 4.000e-02
A10
 1.962e+00
A11
 1.000e+00
A12
 0.000e+00
x-range –