Theoretical study of electron impact triple differential cross sections of N2O by a multicenter distorted-wave method

2018 ◽  
Vol 51 (9) ◽  
pp. 094003 ◽  
Author(s):  
Maomao Gong ◽  
Xingyu Li ◽  
Song Bin Zhang ◽  
Xiangjun Chen
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Differential Cross ◽  
Theoretical Study ◽  
Differential Cross Sections ◽  
Wave Method ◽  
Distorted Wave ◽  
Distorted Wave Method

The excitation of the 2 3 P state of helium by electron impact

1960 ◽  
Vol 258 (1293) ◽  
pp. 147-158 ◽  
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Ground State ◽  
Wave Method ◽  
Distorted Wave ◽  
Polarization Of Radiation ◽  
Oppenheimer Approximation ◽  
Distorted Wave Method

Cross-sections for excitation of the 2 3 P state of helium from the ground state have been calculated by the distorted-wave method. The polarization of radiation emitted as a result of the excitation is also calculated. Comparison is made with the corresponding results given by the Born—Oppenheimer approximation. Although there are considerable differences at electron energies below 100 eV these are much less marked than for the excitation of the 2 3 S state. The distorted wave method gives cross-sections in closer agreement with observation but substantial discrepancies still remain. It is difficult, however, to estimate their magnitude with any certainty because there are inconsistencies in the observed data.

Double differential cross sections in the electron impact ionization of helium

1994 ◽  
Vol 72 (3-4) ◽  
pp. 126-129 ◽  
Author(s):  
S. Brajamani ◽  
N. Ranjit Singh ◽  
M. Babuyaima ◽  
P. S. Mazumdar
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Differential Cross ◽  
Impact Ionization ◽  
Electron Impact Ionization ◽  
Differential Cross Sections ◽  
Distorted Wave ◽  
Distorted Wave Born Approximation ◽  
Wave Approximation ◽  
Final Channel

The double differential cross sections for electron impact ionization of helium are evaluated in the framework of a distorted wave approximation that takes into account the effects of initial channel, final channel, and target distortion. The present results are in fair agreement with the measured values and rigorous DWBA (distorted-wave Born approximation) results of McCarthy and Zhang.

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