Measurement of K-Shell ionization cross sections of Al by 4–9 keV positron impact

2021 ◽  
Vol 180 ◽  
pp. 109321
Author(s):  
S. Liang ◽  
Y. Wu ◽  
Z. Zhao ◽  
X.G. Xia ◽  
Z.X. Ke ◽  
...  
Keyword(s):  
Cross Sections ◽  
Positron Impact ◽  
Ionization Cross ◽  
Ionization Cross Sections ◽  
Shell Ionization

Measurement of CuK-Shell and AgL-Shell Ionization Cross Sections by Low-Energy Positron Impact

2004 ◽  
Vol 92 (22) ◽  
Author(s):  
Yasuyuki Nagashima ◽  
Fuminori Saito ◽  
Yoshiko Itoh ◽  
Akira Goto ◽  
Toshio Hyodo
Keyword(s):  
Cross Sections ◽  
Low Energy ◽  
Positron Impact ◽  
Ionization Cross ◽  
Ionization Cross Sections ◽  
Shell Ionization

Relative Variation of K- And L-Shell Ionization Cross Sections by Electron Impact

1999 ◽  
Vol 5 (S2) ◽  
pp. 584-585
Author(s):  
X. Llovet ◽  
C. Merlet ◽  
J.M. Fernández-Varea ◽  
F. Salvat
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Carbon Films ◽  
X Rays ◽  
Empirical Formulas ◽  
Relative Variation ◽  
Ionization Cross ◽  
Ionization Cross Sections ◽  
Semi Empirical ◽  
Shell Ionization

Knowledge of inner-shell ionization cross sections by electron impact is needed for quantitative procedures in electron probe microanalysis (EPMA) and Auger electron spectroscopy (AES) The common practice is to use semi-empirical formulas, based on the asymptotic limit of the Bethe theory, which sometimes are used beyond their domain of validity. Experimental measurements of ionization cross sections are scarce and affected by considerable uncertainties, thus a mere comparison with experimental data does not permit to draw a definite conclusion abou the accuracy of the various formulas. In this communication, we present new measurements o the relative variation of K- and L-shell ionization cross sections deduced from the counting rate of characteristic x-rays emitted by extremely thin films of Cr, Ni, Cu, Te, Au and Bi bombardec by keV electrons.The studied films were produced by thermal evaporation on backing self-supported 30 nm carbon films.

Modified Kolbensvedt model for the electron impact K-shell ionization cross-sections of atoms and ions

2005 ◽  
Vol 37 (3) ◽  
pp. 361-369 ◽  
Author(s):  
M. A. Uddin ◽  
A. K.F. Haque ◽  
K. R. Karim ◽  
A. K. Basak ◽  
F. B. Malik
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Ionization Cross ◽  
Ionization Cross Sections ◽  
Shell Ionization
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