Results 1 to 10 of about 9,958,589 (304)

Deep Minima in the Triply Differential Cross Section for Ionization of Atomic Hydrogen by Electron and Positron Impact

open access: yesAtoms, 2020
We investigate ionization of atomic hydrogen by electron- and positron-impact. We apply the Coulomb–Born (CB1) approximation, various modified CB1 approximations, the three body distorted wave (3DW) approximation, and the time-dependent close-coupling ...
C. M. DeMars   +4 more
doaj   +3 more sources

Iodine molecule covalente excited states as determined by threshold electron spectrometry [PDF]

open access: yesJournal of the Serbian Chemical Society, 2000
The iodine molecule has been investigated by a threshold electron spectrometer in the incident electron energy range from 1.00 eV to 3.5eV. From the threshold electron spectrum contributions for excitation of three states known from optical ...
Kurepa Milan, Jureta Jozo
doaj   +3 more sources

Electron and Positron Impact Ionization of SF6−nHn(n = 0 − 6); {SCln, SFn−1Cl(n = 1 − 6)} and SF5X(X = CN, CFO)

open access: yesAtoms, 2023
We have calculated the electron and positron impact ionization of a set of molecules, SF6−nHn(n=0−6), SCln(n=1−6), SFn−1Cl(n=1−6) and SF5X(X=CN,CFO), for which there are much fewer data in the literature. We have optimized the targets, and their electric
S. Suriyaprasanth   +2 more
doaj   +1 more source

L-Shell Ionization Cross Sections for Silver by Low-Energy Electron Impacts

open access: yesAtoms, 2022
The L-subshell ionization cross sections and total L–X-ray production cross sections for the Ag atom by the electron impact near the ionization threshold were calculated with a classical-trajectory Monte Carlo method.
Takeshi Mukoyama, Károly Tőkési
doaj   +1 more source

An analytical expression for the K shell ionization cross section of some heavy atomic elements by electron impact [PDF]

open access: yesمجلة التربية والعلم, 1970
: An analytical expression is proposed to describe the k shell ionization cross section by electron impact for some heavy atomic elements (Ho, Yb, W, Au, Pb, and U) had been presented.
Salim Al-Shamma   +2 more
doaj   +1 more source

Electron-Impact Excitation and Dissociation of Heavy Rare Gas Heteronuclear Ions via Transitions to Charge Transfer States

open access: yesAtoms, 2023
Heteronuclear diatomic rare gas molecular cations feature excited electronic terms with charge transfer character located several eV above the ground term.
Alexander Narits   +2 more
doaj   +1 more source

Substituent Effects on EI-MS Fragmentation Patterns of 5-Allyloxy-1-aryl-tetrazoles and 4-Allyl-1-aryl-tetrazole-5-ones; Correlation with UV-Induced Fragmentation Channels

open access: yesMolecules, 2021
1,4- and 1,5-disubstituted tetrazoles possess enriched structures and versatile chemistry, representing a challenge for chemists. In the present work, we unravel the fragmentation patterns of a chemically diverse range of 5-allyloxy-1-aryl-tetrazoles and
Alina Secrieru   +2 more
doaj   +1 more source

Electron-impact spectroscopy [PDF]

open access: yesDiscussions of the Faraday Society, 1963
A spectrometer has been devised for determining electronic energy levels of molecules by inelastic scattering of low-energy electrons. It permits the detection of optically forbidden electronic transitions as clearly as optically allowed ones in a routine manner.
Kuppermann, Aron, Raff, L. M.
openaire   +2 more sources

Electron-Impact Ionization of Carbon

open access: yesAtoms, 2023
We present ionization cross-sections of collisions between electrons and carbon atoms using the classical trajectory Monte Carlo method. Total cross-sections are benchmarked against the reported experimental data and the predictions of numerically ...
Nicolás Bachi   +2 more
doaj   +1 more source

Design and construction of electron impact ion source controller for Mass spectrometer system [PDF]

open access: yesمجله علوم و فنون هسته‌ای, 2023
The resolution of a mass spectrometer is dependent directly on the strength of the output ion and its energy. The number of produced ions depends on the current and the energy of the electron beam.
H.R. Ansari, A. Zolfaghari, A.H. Feghhi
doaj   +1 more source

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