Electron Impact Data on Substituted Acetylenes: Propyne and 2-Butyne1

1955 ◽  
Vol 77 (4) ◽  
pp. 895-896 ◽  
Author(s):  
Fred H. Coats ◽  
Robbin C. Anderson
Keyword(s):  
Electron Impact ◽  
Substituted Acetylenes ◽  
Impact Data

Reactions of excited molecules. II. Reactions of phenylhydrazones on electron impact

1968 ◽  
Vol 21 (3) ◽  
pp. 761 ◽  
Author(s):  
WD Crow ◽  
JL Occolowitz ◽  
RK Solly
Keyword(s):  
Electron Impact ◽  
Quantitative Assessment ◽  
Bond Cleavage ◽  
Thermal Excitation ◽  
Aromatic Ketones ◽  
Excited Molecules ◽  
Impact Data

Electron impact data are presented for the phenylhydrazones of a series of aromatic ketones C6H5-CO-R (R = H, CH3, CD3, C2H5, C6H6), and are discussed in comparison with the results of thermal excitation. Whereas pyrolysis resulted in extensive four-centre migration of R to nitrogen, followed by (or synchronous with) cleavage of the N-X bond, the electron-impact breakdown is largely dominated by N-N bond cleavage. A semi-quantitative assessment is made of the rearrangements which do occur, and the stereochemistry of these and related reactions is discussed.

Ionization Potentials of Aromatic Molecules Determined by Analytical Interpretation of Electron Impact Data

1966 ◽  
Vol 21 (10) ◽  
pp. 1580-1584 ◽  
Author(s):  
J. H. D. Eland ◽  
P. J. Shepherd ◽  
C. J. Danby
Keyword(s):  
Electron Impact ◽  
Mass Spectrometer ◽  
Aromatic Amines ◽  
Ionization Efficiency ◽  
Ionization Potentials ◽  
Analytical Technique ◽  
Aromatic Molecules ◽  
Impact Data ◽  
Best Parameters

The analytical technique proposed by MORRISON 1 has been tested on ionization efficiency curves obtained using an unmodified mass spectrometer. Ionization potentials of a series of aromatic amines have been found by this method and have been used to determine the best parameters for use in calculations by the STREITWIESER ω-technique.

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
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