Total cross sections for charge transfer and production of free electrons by collisions between alkali atoms and some molecules

Physica ◽  
1971 ◽  
Vol 52 (3) ◽  
pp. 422-440 ◽  
Author(s):  
A.P.M. Baede ◽  
J. Los
Keyword(s):  
Charge Transfer ◽  
Cross Sections ◽  
Free Electrons ◽  
Total Cross Sections ◽  
Alkali Atoms

Total cross sections for charge transfer between Alkali Atoms and Halogen Molecules

1969 ◽  
Vol 3 (7) ◽  
pp. 530-531 ◽  
Author(s):  
A.P.M. Baede ◽  
A.M.C. Moutinho ◽  
A.E. de Vries ◽  
J. Los
Keyword(s):  
Charge Transfer ◽  
Cross Sections ◽  
Total Cross Sections ◽  
Alkali Atoms

scholarly journals Close Coupling Theory of Positron Scattering from Alkali Atoms

1994 ◽  
Vol 47 (6) ◽  
pp. 721 ◽  
Author(s):  
Jim Mitroy ◽  
Kurunathan Ratnavelu
Keyword(s):  
Cross Sections ◽  
Alkali Atom ◽  
Coupling Theory ◽  
Positron Scattering ◽  
Close Coupling ◽  
Total Cross Sections ◽  
Hartree Fock ◽  
Atom Scattering ◽  
Alkali Atoms ◽  
Rearrangement Process

The close coupling equatious for positron-alkali atom scattering are written as a set of coupled momentum-space Lippmann-Schwinger equations. The alkali atom is represented by a frozen-core model based upon the Hartree-Fock approximation. The interaction between the positronium and the residual ion is modified by the inclusion of a core potential. Similarly, a core term is present in the interaction describing the rearrangement process. Close coupling calculations of positron scattering from sodium are performed in a model containing multiple sodium (3s, 3p, 4s, 3d, 4p) and positronium (Is, 2s, 2p) states. Cross sections are reported for an energy range from threshold to 50�eV; the total cross sections are in agreement with experimental data.

scholarly journals GENETIC PROGRAMMING APPROACH FOR ELECTRON-ALKALI-METAL ATOM COLLISIONS

2006 ◽  
Vol 20 (32) ◽  
pp. 5463-5471 ◽  
Author(s):  
SALAH YASEEN EL-BAKRY ◽  
AMR RADI
Keyword(s):  
Experimental Data ◽  
Genetic Programming ◽  
Cross Sections ◽  
Alkali Metal Atom ◽  
Intermediate Energy ◽  
Target Atom ◽  
Programming Approach ◽  
Dipole Polarizability ◽  
Total Cross Sections ◽  
Alkali Atoms

New technique is presented for modeling the total cross sections of electron scattering by Na, K, Rb and Cs atoms in the low and intermediate energy regions. The calculations have been performed in the framework of genetic programming (GP) technique. The GP has been running based on the experimental data of the total collisional cross sections to produce the total cross sections for each target atom. The incident energy and atomic number as well as the static dipole polarizability have been used as input variables to find the functions that describe the total collisional cross sections of the scattering of electrons by alkali atoms. The experimental, calculated and predicted total collisional cross sections are compared. The discovered functions show a good match to the experimental data.

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