scholarly journals A Complete CDW Theory for the Single Ionization of Multielectronic Atoms by Bare Ion Impact

Atoms ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 3
Author(s):  
Juan M. Monti ◽  
Michele A. Quinto ◽  
Roberto D. Rivarola
Keyword(s):  
Transition Amplitude ◽  
Emission Spectra ◽  
Heavy Ion ◽  
Distorted Wave ◽  
Single Ionization ◽  
Complete Form ◽  
Active Electron ◽  
Ion Impact ◽  
Range Part ◽  
The Continuum

A complete form of the post version of the continuum distorted wave (CDW) theory is used to investigate the single ionization of multielectronic atoms by fast bare heavy ion beams. The influence of the non-ionized electrons on the dynamic evolution is included through a residual target potential considered as a non-Coulomb central potential through a GSZ parametric one. Divergences found in the transition amplitude containing the short-range part of the target potential are avoided by considering, in that term exclusively, an eikonal phase instead of the continuum factor as the initial channel distortion function. In this way, we achieve the inclusion of the interaction between the target active electron and the residual target, giving place to a more complete theory. The present analysis is supported by comparisons with existing experimental electron emission spectra and other distorted wave theories.

scholarly journals Low-Energy Electrons and Their Dynamical Correlation with Recoil Ions for Single Ionization of Helium by Fast, Heavy-Ion Impact

1994 ◽  
Vol 73 (25) ◽  
pp. 3371-3374 ◽  
Author(s):  
R. Moshammer ◽  
J. Ullrich ◽  
M. Unverzagt ◽  
W. Schmidt ◽  
P. Jardin ◽  
...  
Keyword(s):  
Heavy Ion ◽  
Low Energy ◽  
Dynamical Correlation ◽  
Single Ionization ◽  
Low Energy Electrons ◽  
Ion Impact ◽  
Recoil Ions

scholarly journals Frozen Core Approximation and Nuclear Screening Effects in Single Electron Capture Collisions

Atoms ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 44 ◽  
Author(s):  
Allison Harris
Keyword(s):  
Electron Capture ◽  
Cross Sections ◽  
Heavy Ion ◽  
Single Electron ◽  
Body Model ◽  
Change Of State ◽  
Single Electron Capture ◽  
Core Approximation ◽  
Active Electron ◽  
Ion Impact

Differential cross sections (DCS) for single electron capture from helium by heavy ion impact are calculated using a frozen core 3-body model and an active electron 4-body model within the first Born approximation. DCS are presented for H+, He2+, Li3+, and C6+ projectiles with velocities of 1 MeV/amu and 10 MeV/amu. In general, the DCS from the two models are found to differ by about one to two orders of magnitude with the active electron 4-body model showing better agreement with experiment. Comparison of the models reveals two possible sources of the magnitude difference: the inactive electron’s change of state and the projectile–target Coulomb interaction used in the different models. Detailed analysis indicates that the uncaptured electron’s change of state can safely be neglected in the frozen core approximation, but that care must be used in modeling the projectile–target interaction.

scholarly journals Low-Energy Electrons and Their Dynamical Correlation with Recoil Ions for Single Ionization of Helium by Fast, Heavy-Ion Impact

1995 ◽  
Vol 75 (13) ◽  
pp. 2631-2631 ◽  
Author(s):  
R. Moshammer ◽  
J. Ullrich ◽  
M. Unverzagt ◽  
W. Schmidt ◽  
P. Jardin ◽  
...  
Keyword(s):  
Heavy Ion ◽  
Low Energy ◽  
Dynamical Correlation ◽  
Single Ionization ◽  
Low Energy Electrons ◽  
Ion Impact ◽  
Recoil Ions

HEAVY ION-INDUCED COPPER L X-RAY SPECTRA MEASURED WITH A HIGH RESOLUTION X-RAY CRYSTAL SPECTROMETER

1997 ◽  
Vol 07 (03n04) ◽  
pp. 109-115 ◽  
Author(s):  
K. KAWATSURA ◽  
T. INOUE ◽  
T. IGARASHI ◽  
N. TERAZAWA ◽  
S. ARAI ◽  
...  
Keyword(s):  
High Resolution ◽  
Emission Spectra ◽  
Heavy Ion ◽  
Thick Target ◽  
Crystal Spectrometer ◽  
X Ray ◽  
Hartree Fock ◽  
Ion Impact ◽  
Electron Vacancy ◽  
Shell Vacancy

High resolution L X-ray emission spectra of Cu have been measured for 0.75 MeV/u H , 0.075 and 0.75 MeV/u F , and 0.075 and 0.64 MeV/u Si ion impacts with a Bragg crystal spectrometer. The high resolution X-ray spectra from the Cu thick target for L ι, L η, L α1,2, L β1, and L β3,4 transitions induced by ion excitation are obtained. The X-ray spectra produced by F and Si ion impacts have complicated structures due to multiple L and M shell vacancy production. The L X-ray emission spectra produced by heavy ion impact are compared with the calculated ones based on the Hartree-Fock-Slater method. The origin of the broadening of the L X-ray transition lines to the higher energy side for heavy ion impact is attributed to one 2p plus multiple 3p and 3d electron vacancy production.

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