Ionization Cross-Section Detector as a Reference Standard in Quantitative Analysis by Gas Chromatography.

1963 ◽  
Vol 35 (10) ◽  
pp. 1345-1348 ◽  
Author(s):  
P. G. Simmonds ◽  
J. E. Lovelock
Keyword(s):  
Gas Chromatography ◽  
Quantitative Analysis ◽  
Cross Section ◽  
Ionization Cross Section ◽  
Reference Standard ◽  
Ionization Cross

Comparison of experimental and theoretical XEDS k-factors as a function of accelerating voltage

1990 ◽  
Vol 48 (2) ◽  
pp. 460-461
Author(s):  
Nestor J. Zaluzec
Keyword(s):  
Quantitative Analysis ◽  
Cross Section ◽  
Ionization Cross Section ◽  
Experimental Measurements ◽  
Energy Dispersive Analysis ◽  
Ionization Cross ◽  
Medium Voltage ◽  
K Factor ◽  
Analysis System ◽  
Lower Voltage

For nearly fifteen years k-factor measurements have been made by varying the composition of the standards at fixed accelerating voltage and measuring the change in the experimental k-factor with atomic number. From this data a “best model” of the ionization cross-section is frequently proposed for use in quantitative analysis, however it is valid only at that fixed voltage. Few if any studies seek to determine the systematic variation in the k-factor with accelerating voltage. In this paper experimental measurements of the variation in the k-factor as a function of accelerating voltage are reported. With the advent of medium voltage analytical microscopes routinely available to the microscopy community, it becomes essential to understand how the k-factor varies with accelerating voltage in order that errors in quantitative analysis can be avoided should experimental or theoretical k-factors from lower voltage instruments are applied to the medium voltage regime.Electropolished specimens of β-NiAl were studied in a Philips CM30T electron microscope, equipped with a Be-Window Si(Li) detector interfaced to an EDAX 9900 Energy Dispersive Analysis System.

Electron-Impact Ionization Cross Section of Ions

1969 ◽  
Vol 184 (1) ◽  
pp. 242-244 ◽  
Author(s):  
K. C. Mathur ◽  
A. N. Tripathi ◽  
S. K. Joshi
Keyword(s):  
Electron Impact ◽  
Cross Section ◽  
Ionization Cross Section ◽  
Impact Ionization ◽  
Electron Impact Ionization ◽  
Ionization Cross
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