scholarly journals Low-Energy Elastic Electron Scattering from Helium Atoms

Atoms ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 82
Author(s):  
Robert P. McEachran ◽  
Kathryn R. Hamilton ◽  
Klaus Bartschat
Keyword(s):  
Elastic Scattering ◽  
Electron Scattering ◽  
General Purpose ◽  
Orbital Method ◽  
Elastic Electron Scattering ◽  
Close Coupling ◽  
R Matrix ◽  
B Spline ◽  
Helium Atoms ◽  
Atom Collision

We reinvestigate a key process in electron-atom collision physics, the elastic scattering of electrons from helium atoms. Specifically, results from a special-purpose relativistic polarized-orbital method, which is designed to treat elastic scattering only, are compared with those from a very extensive, fully ab initio, general-purpose B-spline R-matrix (close-coupling) code.

scholarly journals Benchmark Angle-Differential Cross-Section Ratios for Excitation of the 4p5s Configuration in Krypton

Atoms ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 61
Author(s):  
Ahmad Sakaamini ◽  
Jean-Baptiste Faure ◽  
Murtadha A. Khakoo ◽  
Oleg I. Zatsarinny ◽  
Klaus Bartschat
Keyword(s):  
Experimental Data ◽  
Differential Cross Section ◽  
Cross Section ◽  
Electron Scattering ◽  
Spin Exchange ◽  
Electronic Excitations ◽  
Close Coupling ◽  
R Matrix ◽  
B Spline

Benchmark intensity ratio measurements of the energy loss lines of krypton for excitation of the 4p61S0→4p55s[3/2]2, 4p55s[3/2]1, 4p55s′[1/2]0, and 4p55s′[1/2]1 transitions are reported, these being the lowest electronic excitations for krypton. The importance of these ratios as stringent tests of theoretical electron scattering models for the noble gases is discussed, as well as the role of spin-exchange and direct processes regarding the angular dependence of these ratios. The experimental data are compared with predictions from fully-relativistic B-spline R-matrix (close-coupling) calculations.

scholarly journals Relativistic B-Spline R-Matrix Calculations for Electron Collisions with Ytterbium

Atoms ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 47
Author(s):  
Kathryn R. Hamilton ◽  
Klaus Bartschat ◽  
Oleg Zatsarinny
Keyword(s):  
Experimental Data ◽  
Electron Scattering ◽  
Cross Sections ◽  
Matrix Method ◽  
Model Potential ◽  
Electron Collisions ◽  
R Matrix ◽  
B Spline ◽  
Potential Approach

We have applied the full-relativistic Dirac B-Spline R-matrix method to obtain cross sections for electron scattering from ytterbium atoms. The results are compared with those obtained from a semi-relativistic (Breit-Pauli) model-potential approach and the few available experimental data.

Differential elastic electron scattering

1996 ◽  
Vol 74 (7-8) ◽  
pp. 461-467 ◽  
Author(s):  
Albert Crowe ◽  
Danica Cvejanović
Keyword(s):  
Elastic Scattering ◽  
Energy Dependence ◽  
Electron Scattering ◽  
Cross Sections ◽  
Differential Cross ◽  
Rare Gas ◽  
Differential Cross Sections ◽  
Elastic Electron ◽  
Elastic Electron Scattering ◽  
Positron Scattering

We present the energy dependence of electron–argon and electron–krypton differential cross sections for elastic scattering, discuss their general characteristics, and compare them with existing equivalent data on positron scattering. The present measurements were stimulated by corresponding positron–heavy rare-gas-atom results. Our first aim is to provide a set of data that can be directly compared with the data on positron scattering and hence possibly contribute to the understanding of structures in that data.

scholarly journals Low-energy elastic electron scattering from ethylene: Elastic scattering and vibrational excitation

2016 ◽  
Vol 93 (1) ◽  
Author(s):  
M. A. Khakoo ◽  
S. M. Khakoo ◽  
A. Sakaamini ◽  
B. A. Hlousek ◽  
L. R. Hargreaves ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Electron Scattering ◽  
Vibrational Excitation ◽  
Low Energy ◽  
Elastic Electron ◽  
Elastic Electron Scattering

Elastic Scattering of Electrons from Argon-40

1971 ◽  
Vol 49 (15) ◽  
pp. 2073-2075 ◽  
Author(s):  
J. L. Groh ◽  
R. P. Singhal ◽  
H. S. Caplan
Keyword(s):  
Elastic Scattering ◽  
Phase Shift ◽  
Momentum Transfer ◽  
Electron Scattering ◽  
Charge Radius ◽  
Elastic Electron ◽  
Elastic Electron Scattering ◽  
Fermi Distribution ◽  
Momentum Transfer Range

The r.m.s. charge radius of Argon-40 was measured by elastic electron scattering in the momentum transfer range 0.5 < q < 0.85 fm−1. The result obtained using a phase shift code and assuming a Fermi distribution was 3.473 ± 0.045 fm.

scholarly journals Electron scattering from aluminum: B-spline R-matrix calculations

2015 ◽  
Vol 635 (5) ◽  
pp. 052012
Author(s):  
Oleg Zatsarinny ◽  
Klaus Bartschat ◽  
Elizabeth Nagy ◽  
Sergey Gedeon ◽  
Viktor Gedeon ◽  
...  
Keyword(s):  
Electron Scattering ◽  
R Matrix ◽  
B Spline

Charge Radii of 20, 22Ne Determined from Elastic Electron Scattering

1971 ◽  
Vol 49 (11) ◽  
pp. 1434-1436 ◽  
Author(s):  
J. R. Moreira ◽  
R. P. Singhal ◽  
H. S. Caplan
Keyword(s):  
Elastic Scattering ◽  
Phase Shift ◽  
Electron Scattering ◽  
Ground State ◽  
Born Approximation ◽  
Phase Shift Analysis ◽  
Elastic Electron ◽  
Elastic Electron Scattering ◽  
Charge Radii ◽  
Shift Analysis

The charge radii of 20, 22Ne have been measured by elastic scattering of electrons. The data have been analyzed in the first Born approximation as well as with a phase shift analysis. The results obtained are R(22Ne)/R(20Ne) = 0.976 ± 0.010. This anomaly is shown to be consistent with ground state deformations in 20, 22Ne.

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