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Thursday, August 6, 2020 | History

4 edition of Single and Multiple Ionization of Atoms and Ions by Electron Impact (Physics Reviews) found in the catalog.

Single and Multiple Ionization of Atoms and Ions by Electron Impact (Physics Reviews)

by Viateheslav P. Shevelko

  • 299 Want to read
  • 16 Currently reading

Published by CRC .
Written in English

    Subjects:
  • PHYSICS,
  • Solid State Physics,
  • Science / Solid State Physics,
  • Science

  • Edition Notes

    ContributionsI M Khalatnikov (Editor)
    The Physical Object
    FormatPaperback
    Number of Pages136
    ID Numbers
    Open LibraryOL9802727M
    ISBN 109058230155
    ISBN 109789058230157

    Electron Ionization. Electron ionization (EI, formerly known as electron impact ionization [1] and electron bombardment ionization [2]) is an ionization method in which energetic electrons interact with solid or gas phase atoms or molecules to produce ions. [3] EI was one of the first ionization techniques developed for mass spectrometry. [4] However, this method is still a popular ionization. Atoms, an international, peer-reviewed Open Access journal. Atoms (ISSN ; CODEN: ATOMC5) is an international, peer-reviewed and cross-disciplinary scholarly journal of scientific studies related to all aspects of the atom published quarterly online by MDPI.. Open Access —free for readers, with article processing charges (APC) paid by authors or their institutions.

    The electron volt is frequently used as an energy unit for single molecules or atoms. 1 eV = 33 (49) x J. So that: 1 eV (per molecule or atom) = 6 kJ/mole. 3. Product or fragment ions may be called daughter ions in some literature articles, but the term is considered controversial and is falling into disuse. Bear: Single and double electron excitation, single ionization, excitation of autoionizing states of helium by particle impact.; Bear tion - ionization of helium by electron and ion impact. er - ionization in ion-atom collisions. Cluster - Sputtering by particle bombardment in a shock wave model ; al line shapes of Hydrogen-like ions in high temperature plasma.

    Chapter 6 Electron Ionization M+• is the symbol for a molecular ion. A single-barbed arrow is used to indicate the movement of a single electron: A double-barbed arrow is used to indicate the movement of a pair of electrons: ionization, and the term “electron impact” is no longer used. Fig. 4. Ionization rate coefficients for single ionization of oxygen atoms and ions from the ground state by electron-impact in a tenuous plasma (Maxwellian distribution, no lowering of ionization potential, no collision limit) In cases (2) and (3) the ionization potential of Ref. 5 is to be replaced.


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Single and Multiple Ionization of Atoms and Ions by Electron Impact (Physics Reviews) by Viateheslav P. Shevelko Download PDF EPUB FB2

Ions consisting of only a single atom are termed atomic or monatomic ions, while two or more atoms form molecular ions or polyatomic ions. In the case of physical ionization in a fluid (gas or liquid), "ion pairs" are created by spontaneous molecule collisions, where each generated pair consists of a free electron and a positive ion.

[1]. It is perhaps surprising that a process which was one of the first to be studied on an atomic scale, and a process which first received attention over seven decades ago, continues to be the object of diverse and intense research efforts. Such is the case with the (seemingly) conceptually simple and familiar mechanism of electron impact ionization of atoms, molecules, and ions.

Spectroscopic data of atoms and atomic ions show that the binding energy significantly exceeds the atomic ionization potential for an electron in a singly charged ion (and even more so in a multiply charged ion).

It is approximately twice as high for alkaline-earth atoms and atoms of noble gases, and over five times as high for the alkali : Nikolai B. Delone, Vladimir P. Krainov. Electron Impact Ionization: Electron impact ionization (ei) is by far the most commonly used ionization method.

The effluent from the GC enters a partially enclosed ion source. Electrons “boiled” from a hot wire or ribbon (filament) are accelerated typically by 70 V (and thus have 70 eV of energy) before entering the ion source through a. 2. General features of multiple ionization by electron impact.

Compared with the single ionization where the only direct ionization process plays a dominant role, multiple ionization processes are more complicated and, in addition to the direct ionization processes, so-called indirect ionization processes play a much more important role and often dominate over the direct by: 4.

Cite this chapter as: Reid R.H.G. () Ionization of Atoms and Ions by Electron Impact. In: Burke P.G., Joachain C.J. (eds) Photon and Electron Collisions with Atoms and Molecules. We investigate electron-impact single ionization of He-like ions of charge state q = 0, 6 in the initial ground (1s^2 ^1S) and metastable (1s2s ^3S) states.

Multiple ionization in pure ionization and electron capture of atoms Induced by Li, C, F, Ne with q=3+ projectiles F3+ Cross sections for direct multiple ionization of Ne, as a function of the projectile energy, for the ionization channel.

Explore the latest full-text research PDFs, articles, conference papers, preprints and more on ATOMIC COLLISIONS. Find methods information, sources, references or conduct a literature review on. Electron ionization (EI, formerly known as electron impact ionization and electron bombardment ionization) is an ionization method in which energetic electrons interact with solid or gas phase atoms or molecules to produce ions.

EI was one of the first ionization techniques developed for mass spectrometry. However, this method is still a popular ionization technique. Electron impact ionization of atoms and ions is one of the most fundamental problems in Belfast group have carried out accurate experimental measurements of single and multiple ionization of copper by electron impact at energies ranging from near threshold ( eV for.

New experimental data on double-ionization cross sections of neutral atoms, positive and negative ions by electron impact are reported.

These and other relevant data are compared with recent multiple-ionization semiempirical formulae extended for the case of two-electron ionization.

Low-energy electron emission spectra are studied in collisions of MeV/amu Au 53+ ions with neon and argon atoms for well-defined degrees of target ionization.

We calculate doubly differential cross sections as functions of the recoil-ion charge state in the continuum-distorted-wave with eikonal initial-state approximation using a binomial analysis of the total and differential ionization. Dynamics of multiple ionization of atoms and molecules by electron, photon, and ion impact—investigated by the COLTRIMS imaging method H.

Schmidt-Bo¨ckinga,*, different to ionization by a single photon: it can be explained by the so-called re. Autor: Kirchner, T. et al.; Genre: Zeitschriftenartikel; Im Druck veröffentlicht: ; Titel: Doubly differential electron-emission spectra in single and multiple ionization of noble-gas atoms by fast highly-charged- ion impact.

We study low-energy electron emission spectra in MeV/amu Au^53+ collisions with noble gas atoms obtained in coincidence with the charge state of the recoil ion.

Doubly differential cross sections are calculated in the continuum distorted wave with eikonal initial state approximation using a binomial analysis of the total and differential ionization probabilities.

Electron impact ionization of atoms and ions is one of the most fundamental collision processes in atomic and molecular physics. Knowledge of ionization and excitation cross sections is of fundamental importance for understanding collision dynamics and electron -atom interactions, as well as in several applied fields such as radiation science, astrophysics, Auger electron spectroscopy (AES.

Wannier, G. () The Threshold Law for Single Ionization of Atoms or Ions by Electrons. Physical Review, 90, Electron Ionization and Excitation: A) Figure Electron ionization accompanied by different degree of excitation of the molecular ion.

Soft ionizing events transfer excess energy to the ionized molecule, which is observed. Harder collisions also occur and give rise to the fragment ions frequently seen in EI mass spectra.

The Binary-Encounter-Bethe (BEB) model for electron-impact total ionization cross sections of neutral molecules has been modified for molecular positive ions. The total ionization cross sections for H 2 +, N 2 +, CD +, and CO + from the modified BEB formula are compared to available experimental data.

@article{osti_, title = {Single and multiple ionization of C{sub 60} fullerenes and collective effects in collisions with highly charged C, F, and Si ions with energy 3 MeV/u}, author = {Kelkar, A H and Kadhane, U and Misra, D and Tribedi, L C and Gulyas, L}, abstractNote = {We have measured absolute cross sections for single, double, triple, and quadruple ionization of C{sub 60} in.

Thus, according to the work of Fainstein et al for the single ionization of atoms by ion impact and extended by Olivera et al and then by Galassi et al (, ) to the case of molecular targets, the interaction between the projectile and the residual target plays a negligible role when doubly differential cross sections (DDCS) are.

This finding links Compton scattering to processes such as ionization by ultrashort optical pulses 2, electron impact ionization 3,4, ion impact ionization 5,6 and neutron scattering 7, where.