Time-Dependent Calculation of Electron-Hydrogen Single Differential Ionization Cross Sections Using Pseudostates

2001 ◽  
pp. 27-43
Author(s):  
D. O. Odero ◽  
J. L. Peacher ◽  
D. H. Madison
Keyword(s):  
Cross Sections ◽  
Time Dependent ◽  
Ionization Cross ◽  
Ionization Cross Sections

scholarly journals Electron-impact ionization of the Pb atom

2021 ◽  
Vol 75 (2) ◽  
Author(s):  
M. S. Pindzola ◽  
S. D. Loch ◽  
J. P. Colgan
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Impact Ionization ◽  
Polarization Potential ◽  
Time Dependent ◽  
Experimental Measurements ◽  
Ionization Cross ◽  
Close Coupling ◽  
Direct Ionization ◽  
Ionization Cross Sections

Abstract Electron-impact ionization cross sections are calculated for the ground configuration of the Pb atom. Time-dependent close-coupling cross sections for the direct ionization of the 6s and 6p subshells leading to single ionization are calculated with and without a polarization potential. Configuration-average distorted-wave cross sections for the direct ionization of the 6s and 6p subshells leading to single ionization are also calculated with and without a polarization potential. We find the time-dependent close-coupling cross sections using a polarization potential to be in good agreement with convergent-close-coupling cross sections using a polarization potential. The total direct ionization cross sections are compared to two sets of experimental measurements. The differences between the direct ionization cross sections and the experimental measurements are mainly due to indirect ionization cross sections coming from the $$6s^2 6p^2 \rightarrow 6s 6p^3$$ 6 s 2 6 p 2 → 6 s 6 p 3 excitation followed by autoionization. GraphicAbstract

scholarly journals Electron-Impact Ionization of Heavy Atoms Using the Time-Dependent Close-Coupling Method

Atoms ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 32
Author(s):  
Michael S. Pindzola ◽  
Stuart D. Loch ◽  
James P. Colgan
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Impact Ionization ◽  
Coupling Method ◽  
Time Dependent ◽  
Ionization Cross ◽  
Close Coupling ◽  
Direct Ionization ◽  
Total Ionization ◽  
Ionization Cross Sections

The time-dependent close-coupling method has been recently applied to calculate electron-impact direct ionization cross sections for the Kr, W, and Pb atoms. An overview is presented for these three heavy neutral atom systems. When the direct ionization cross sections are combined with excitation-autoionization cross sections, the total ionization cross sections were found to be in reasonable agreement with crossed-beams measurements for Kr and Pb.

EXCITATION AND IONIZATION CROSS SECTIONS FOR HE I FROM NORMALIZED BORN AND K-MATRIX CALCULATIONS: ΔS = 0 TRANSITIONS FROM n = 2, 3 EXCITED STATES

2000 ◽  
Vol 74 (1) ◽  
pp. 123-153 ◽  
Author(s):  
I.L. Beigman ◽  
L.A. Vainshtein ◽  
M. Brix ◽  
A. Pospieszczyk ◽  
I. Bray ◽  
...  
Keyword(s):  
Excited States ◽  
Cross Sections ◽  
Ionization Cross ◽  
Ionization Cross Sections ◽  
K Matrix

Differential transfer ionization cross sections for 50–175-keV proton-helium collisions

1994 ◽  
Vol 50 (1) ◽  
pp. 337-342 ◽  
Author(s):  
S. W. Bross ◽  
S. M. Bonham ◽  
A. D. Gaus ◽  
J. L. Peacher ◽  
T. Vajnai ◽  
...  
Keyword(s):  
Cross Sections ◽  
Ionization Cross ◽  
Transfer Ionization ◽  
Ionization Cross Sections
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