Continuous ultraviolet emissions produced by electron impact on SF6 and NF3

1988 ◽  
Vol 88 (7) ◽  
pp. 4252-4256 ◽  
Author(s):  
Z. J. Jabbour ◽  
K. A. Blanks ◽  
K. E. Martus ◽  
K. Becker
Keyword(s):  
Electron Impact ◽  
Ultraviolet Emissions

Vacuum ultraviolet emissions of trifluoromethane following electron impact in the wavelength range 50–130 nm

1989 ◽  
Vol 67 (7) ◽  
pp. 694-698 ◽  
Author(s):  
Shouye Wang ◽  
J. W. McConkey
Keyword(s):  
Electron Impact ◽  
Wavelength Range ◽  
Cross Sections ◽  
Incident Energy ◽  
Vacuum Ultraviolet ◽  
Neutral Hydrogen ◽  
Dissociative Excitation ◽  
Hydrogen Atoms ◽  
Threshold Excitation ◽  
Ultraviolet Emissions

The dissociative excitation of CF3H by electron impact has been studied under single collision conditions for incident energies up to 600 eV. The emission spectrum in the wavelength range 50–130 nm shows many features arising from neutral and singly ionized fluorine and carbon fragments, as well as from neutral hydrogen atoms. Absolute cross sections for the observed features were measured at 200 eV incident energy, while the excitation functions of the most intense emissions were studied over the whole energy range. The threshold excitation of the hydrogen Lyman α line displays onsets at 18.4 and 34.0 eV, while that of the fluorine F I 95.5 nm feature shows only one onset at 33.0 eV. Possible dissociation channels are discussed.

The measurement of inner-shell ionization cross aections by electron impact in a TEM

1992 ◽  
Vol 50 (2) ◽  
pp. 1266-1267
Author(s):  
Raynald Gauvin ◽  
Gilles L'Espérance
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Weight Fraction ◽  
Thin Foil ◽  
Specimen Thickness ◽  
Ionization Cross ◽  
Electron Dose ◽  
Total Electron ◽  
Inner Shell Ionization ◽  
Shell Ionization

Values of cross sections for ionization of inner-shell electrons by electron impact are required for electron probe microanalysis, Auger-electron spectroscopy and electron energy-loss spectroscopy. In this work, the results of the measurement of inner-shell ionization cross-sections by electron impact, Q, in a TEM are presented for the K shell.The measurement of QNi has been performed at 120 KeV in a TEM by measuring the net X-ray intensity of the Kα line of Ni, INi, which is related to QNi by the relation :(1)where i is the total electron dose, (Ω/4π)is the fractional solid angle, ω is the fluorescence yield, α is the relative intensity factor, ε is the Si (Li) detector efficiency, A is the atomic weight, ρ is the sample density, No is Avogadro's number, t' is the distance traveled by the electrons in the specimen which is equal to τ sec θ neglecting beam broadening where τ is the specimen thickness and θ is the angle between the electron beam and the normal of the thin foil and CNi is the weight fraction of Ni.

Dissociative excitation of molecules electron impact

1980 ◽  
Vol 77 ◽  
pp. 773-777 ◽  
Author(s):  
F.J. de Heer ◽  
H.A. Van Sprang ◽  
G.R. Mohlmann
Keyword(s):  
Electron Impact ◽  
Dissociative Excitation

Electron impact double ionization of neon

1993 ◽  
Vol 03 (C6) ◽  
pp. C6-117-C6-123 ◽  
Author(s):  
M. J. FORD ◽  
J. P. DOERING ◽  
J. W. COOPER ◽  
M. A. COPLAN ◽  
J. H. MOORE
Keyword(s):  
Electron Impact ◽  
Double Ionization

Electron impact excitation of Al XIII : Collision strengths and rate coefficients

2001 ◽  
Vol 11 (PR2) ◽  
pp. Pr2-309-Pr2-312
Author(s):  
K. M. Aggarwal ◽  
F. P. Keenan ◽  
S. J. Rose
Keyword(s):  
Electron Impact ◽  
Impact Excitation ◽  
Rate Coefficients ◽  
Electron Impact Excitation

EXPERIMENTS ON ELECTRON IMPACT EXCITATION AND DIELECTRONIC RECOMBINATION AT HARVARD-SMITHSONIAN

1989 ◽  
Vol 50 (C1) ◽  
pp. C1-405-C1-409
Author(s):  
L. D. GARDNER ◽  
J. L. KOHL ◽  
D. W. SAVIN ◽  
A. R. YOUNG
Keyword(s):  
Electron Impact ◽  
Dielectronic Recombination ◽  
Impact Excitation ◽  
Electron Impact Excitation
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