Dissociative excitation of CF4 by controlled electron impact

1989 ◽  
Vol 67 (7) ◽  
pp. 699-705 ◽  
Author(s):  
S. Wang ◽  
J. L. Forand ◽  
J. W. McConkey
Keyword(s):  
Energy Range ◽  
Emission Spectrum ◽  
Electron Impact ◽  
Cross Sections ◽  
Incident Energy ◽  
Dissociative Excitation ◽  
Excitation Mechanism ◽  
Excitation Functions ◽  
Single Collision

Dissociative excitation of CF4 by electron impact has been studied under single-collision conditions for incident energies up to 600 eV. The emission spectrum in the range 50–130 nm shows many features arising from neutral and singly ionized fluorine and carbon fragments. 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. Cascade was shown to be the dominant excitation mechanism for some of these features.

Dissociative excitation of SF6 by controlled electron impact

1986 ◽  
Vol 64 (3) ◽  
pp. 269-276 ◽  
Author(s):  
J. L. Forand ◽  
K. Becker ◽  
J. W. McConkey
Keyword(s):  
Emission Spectrum ◽  
Electron Impact ◽  
Spectral Range ◽  
Cross Sections ◽  
Dissociative Excitation ◽  
Excitation Functions ◽  
Single Collision

Dissociative excitation of SF6 by electron impact has been studied under single-collision conditions for incident energies up to 600 eV. The emission spectrum in the spectral range 450–1850 Å shows many features arising from neutral and singly ionized fluorine and sulphur fragments. Absolute cross sections for many of the emissions were measured, and excitation functions and appearance potentials were determined for selected features from each of the four systems. The largest cross sections were found for the FI transitions at 955 Å (2.3 × 10−18 cm2) and 975 Å (1.7 × 10−18 cm2).

scholarly journals Production of O(1D) following electron impact on CO2

2013 ◽  
Vol 91 (12) ◽  
pp. 1044-1048 ◽  
Author(s):  
W. Kedzierski ◽  
J.D. Hein ◽  
C.J. Tiessen ◽  
D. Lukic ◽  
J.A. Trocchi ◽  
...  
Keyword(s):  
Energy Range ◽  
Electron Impact ◽  
Cross Sections ◽  
Impact Energy ◽  
Production Cross ◽  
Threshold Energy ◽  
Dissociative Excitation ◽  
Pulsed Electron Beam ◽  
Exciting Electron ◽  
Relative Production

We have studied the excitation of metastable O(1D) following dissociative excitation of CO2 in the electron impact energy range from threshold to 400 eV. A solid Ne matrix at ∼20 K forms the heart of the detector. This is sensitive to the metastable species through the formation of excited excimers (NeO*), The resultant excimer radiation is readily detected, providing a means of measuring the production of the metastables. Using a pulsed electron beam and time-of-flight techniques, we have measured the O(1D) kinetic energy spectrum and its relative production cross sections as a function of electron impact energy. Threshold energy data are used to gain information about the excitation channels involved. In addition, an emission excitation function for the red photons, emitted in coincidence with the exciting electron pulse, has been measured in the 0–400 eV energy range.

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.

Calculation of proton total reaction cross sections for some target nuclei in incident energy range of 10–600 MeV

2010 ◽  
Vol 73 (10) ◽  
pp. 1700-1706 ◽  
Author(s):  
H. Büyükuslu ◽  
A. Kaplan ◽  
A. Aydin ◽  
E. Tel ◽  
G. Yıldırım
Keyword(s):  
Energy Range ◽  
Cross Sections ◽  
Incident Energy ◽  
Reaction Cross ◽  
Total Reaction ◽  
Reaction Cross Sections

Dissociative excitation of CH4 by electron impact: Emission cross sections for the fragment species

1996 ◽  
Vol 213 (1-3) ◽  
pp. 369-384 ◽  
Author(s):  
K. Motohashi ◽  
H. Soshi ◽  
M. Ukai ◽  
S. Tsurubuchi
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Dissociative Excitation

Absolute cross sections for D2 Lyman and Werner band excitation by controlled electron impact

1984 ◽  
Vol 62 (1) ◽  
pp. 1-9 ◽  
Author(s):  
K. Becker ◽  
J. W. McConkey
Keyword(s):  
Energy Range ◽  
Electron Impact ◽  
Cross Section ◽  
Cross Sections ◽  
Impact Energy ◽  
Emission Cross Section ◽  
Direct Excitation ◽  
The Cross ◽  
Impact Energies

We have studied the Lyman [Formula: see text] and Werner [Formula: see text] band emissions produced by 20–500-eV electrons incident on molecular deuterium, D2. Emission cross sections of (3.7 ± 0.9) × 10−17 cm2 for the B → X and (3.54 ± 0.74) × 10−17 cm2 for the C → X system have been determined at 100-eV impact energy. Cascading did not play an important role in the [Formula: see text] emission, but it was shown to affect the [Formula: see text] emission seriously, particularly for impact energies below 50 eV. We estimate the cross section for direct excitation of the [Formula: see text] state and the cascade cross section to be 2.95 × 10−17 and 0.75 × 10−17 cm2, at 100 eV respectively. The cascade cross section is 20 ± 10% of the total B → X emission cross section, and is essentially constant in the energy range 300–50 eV, but increases significantly for lower impact energies, e.g., to 40 ± 15% at 27.5 eV. The cross section for the atomic 2p → 1s Lyman α emission from D2 has also been measured and the value of 1.00 × 10−17 cm2 at 100 eV is 20% smaller than the cross section for Lyman α emission from H2.

Excitation of singly-ionized barium ions by electron impact

1970 ◽  
Vol 48 (3) ◽  
pp. 275-278 ◽  
Author(s):  
J. Davis ◽  
S. Morin
Keyword(s):  
Energy Range ◽  
Electron Impact ◽  
Cross Section ◽  
Cross Sections ◽  
Experimental Measurements ◽  
Barium Ions ◽  
Semiclassical Method ◽  
The Cross

We present cross-section calculations for excitation of singly-ionized barium ions by electron impact over the energy range from 3 to 100 eV. The cross sections were evaluated using Burgess' semiclassical method. Finally, our predictions are compared with two other current techniques and some recent experimental measurements. The agreement was found to be good.

Electron induced ionisation of C3 to C6 ethanoates

RSC Advances ◽  
2015 ◽  
Vol 5 (26) ◽  
pp. 20090-20097 ◽  
Author(s):  
Jaspreet Kaur ◽  
Rahla Naghma ◽  
Bobby Antony
Keyword(s):  
Energy Range ◽  
Electron Impact ◽  
Present Article ◽  
Cross Sections

The present article reports the calculation of electron impact total ionisation cross sections for C3 to C6 ethanoates for the energy range from the ionisation threshold of the target to 5000 eV.

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