Positron-monosilane (SiH4) collisions at low, intermediate and high energies using a spherical complex optical potential approach

1986 ◽  
Vol 19 (22) ◽  
pp. L807-L813 ◽  
Author(s):  
A Jain
Keyword(s):  
Optical Potential ◽  
Potential Approach ◽  
High Energies ◽  
Spherical Complex

scholarly journals Differential and integral cross sections for electron elastic scattering by ammonia for incident energies ranging from 10 eV to 20 keV

2018 ◽  
Vol 64 (5) ◽  
pp. 498
Author(s):  
Hocine Aouchiche
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Cross Sections ◽  
Optical Potential ◽  
Large Set ◽  
Quantum Calculation ◽  
Hartree Fock ◽  
Spherical Complex ◽  
Static Part ◽  
Model Point

Differential and integral cross sections for elastic scattering of electron by NH3 molecule are investigated for the energy ranging from 10 eV to 20 keV.  The calculations are carried out in the framework of partial wave formalism describing the target molecule by means of one center molecular Hartree-Fock functions.  A spherical complex optical potential used includes a static part – obtained here numerically from quantum calculation – and fine effects like correlation, polarization and exchange potentials. The results obtained in this model point out clearly the role played by the exchange and the correlation-polarization contributions in particular at lower scattering angles and lower incident energies. Both differential and integral cross sections obtained are compared with a large set of experimental data available in the literature and well agreement is found throughout the scattering angles and whole energy range investigated here.

Electron impact total and ionization cross sections for Sr, Y, Ru, Pd, and Ag atoms

2013 ◽  
Vol 91 (9) ◽  
pp. 744-750 ◽  
Author(s):  
Dhanoj Gupta ◽  
Rahla Naghma ◽  
Bobby Antony
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Optical Potential ◽  
Atomic Orbital ◽  
Atomic Charge ◽  
Ionization Cross ◽  
Charge Densities ◽  
Hartree Fock ◽  
Spherical Complex ◽  
Ionization Cross Sections

Calculation of electron impact total and ionization cross sections for Sr, Y, Ru, Pd, and Ag atoms were performed using spherical complex optical potential and complex scattering potential-ionization contribution methods. The complex optical potential model is formulated from the target parameters and the atomic charge density. The spherical charge densities are in turn derived from the Roothaan–Hartree–Fock wavefunctions defining the atomic orbital of the target. In the present study cross sections are computed in the energy range from ionization threshold to 2000 eV. The results obtained are compared with other theories and measurements wherever available and were found to be quite consistent and uniform. In general, present data show an overall reasonable agreement with other results. Dependence of total cross sections on the number of target electrons and peak of ionization cross section on target parameters were also found to be consistent with previous observations.

A Quasi-Potential Approach for Describing pp-Scattering at High Energies

2003 ◽  
Vol 46 (7) ◽  
pp. 740-742
Author(s):  
S. K. Abdulvagabova ◽  
E. A. Rasulov
Keyword(s):  
Potential Approach ◽  
High Energies

Cold collisions of atomic hydrogen with antihydrogen atoms: An optical potential approach

2004 ◽  
Vol 69 (4) ◽  
Author(s):  
B. Zygelman ◽  
Alejandro Saenz ◽  
P. Froelich ◽  
S. Jonsell
Keyword(s):  
Atomic Hydrogen ◽  
Optical Potential ◽  
Cold Collisions ◽  
Potential Approach

Optical potential approach to p-p large angle scattering

1965 ◽  
Vol 37 (4) ◽  
pp. 1739-1742 ◽  
Author(s):  
G. A. Armoudian ◽  
D. Itô ◽  
K. Mori
Keyword(s):  
Optical Potential ◽  
Large Angle ◽  
Potential Approach ◽  
Angle Scattering ◽  
Large Angle Scattering

Optical potential approach for positron scattering by metastable 2 3 S state of helium

2017 ◽  
Vol 26 (2) ◽  
pp. 023401
Author(s):  
Xi-Gang Wu ◽  
Yong-Jun Cheng ◽  
Fang Liu ◽  
Ya-Jun Zhou
Keyword(s):  
Optical Potential ◽  
Positron Scattering ◽  
Potential Approach

Optisches Potential für hohe Energien

1968 ◽  
Vol 23 (12) ◽  
pp. 1888-1893
Author(s):  
M. Weigel ◽  
D. Mack
Keyword(s):  
Numerical Calculation ◽  
Autocorrelation Function ◽  
Imaginary Part ◽  
Optical Potential ◽  
Scattering Amplitude ◽  
Density Fluctuations ◽  
The Real ◽  
Elementary Derivation ◽  
High Energies

An elementary derivation of the optical potential for high energies is given. For the determination of the optical potential only the knowledge of the scattering amplitude for free nucleons and of the autocorrelation function for density fluctuations is necessary. The numerical calculation of the real- and imaginary part of the optical potential was performed using the Tabakin potential.

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