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.

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.

Excitation of the Resonance Lines of Ar by Electrons

1973 ◽  
Vol 51 (9) ◽  
pp. 914-921 ◽  
Author(s):  
J. W. McConkey ◽  
F. G. Donaldson
Keyword(s):  
Energy Range ◽  
Electron Impact ◽  
Oscillator Strength ◽  
Cross Sections ◽  
Experimental Results ◽  
Impact Excitation ◽  
Electron Impact Excitation

'Polarization-free' measurements are presented of the electron impact excitation of the 1048 Å and 1067 Å resonance lines of argon in the energy range 10–2000 eV. Cross sections are made absolute by normalizing to the optical oscillator strength of the 1048 Å line. Cascade is shown to play a major role in the excitation of the 4s levels. Comparison is made with other experimental results and with theory where available.

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.

Electron Impact Ionization Cross Sections of N2 and O2

1975 ◽  
Vol 53 (11) ◽  
pp. 1044-1046 ◽  
Author(s):  
Suresh Chandra ◽  
Udit Narain
Keyword(s):  
Experimental Data ◽  
Energy Range ◽  
Electron Impact ◽  
Cross Sections ◽  
Impact Ionization ◽  
Electron Impact Ionization ◽  
Ionization Cross ◽  
Ionization Cross Sections ◽  
Good Agreement

The ionization cross sections of N2 and O2 have been calculated in the energy range from threshold to 20 keV using a modified approach. The results are in good agreement with the available experimental data.

scholarly journals The effect of exchange and absorption potential in the distorted wave calculation of electron impact excitation of the autoionizing state of caesium

2020 ◽  
Vol 1 (1) ◽  
pp. 39-46
Author(s):  
A. A. Ochieng ◽  
J Okumu ◽  
C S Singh
Keyword(s):  
Energy Range ◽  
Electron Impact ◽  
Cross Sections ◽  
Intermediate Energy ◽  
Impact Excitation ◽  
Experimental Result ◽  
Electron Impact Excitation ◽  
Distorted Wave ◽  
Autoionizing State ◽  
Absorption Potential

We have calculated the differential and integral cross sections for electron impact excitation of the lowest autoionizing level of caesium atoms in the energy range 13 – 500 eV using the distorted wave method. In this study we have used a complex distortion potential as the distortion potential both at the initial and the final channels. Our results are compared amongst themselves to establish the effect of exchange and imaginary absorption potentials. We also compared with other available theoretical and experimental results to determine the suitability of our present method. From the results it is seen that when an absorption potential is included in the distortion potential, the integral cross section moves closer to the experimental result in the intermediate energy range 19 – 40 eV.

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