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2 edition of Ion-electron dissociative recombination in vibrationally excited gases. found in the catalog.

Ion-electron dissociative recombination in vibrationally excited gases.

Augustine James Cunningham

Ion-electron dissociative recombination in vibrationally excited gases.

by Augustine James Cunningham

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Published .
Written in English


Edition Notes

Thesis (Ph. D.)--The Queen"s University of Belfast, 1969.

The Physical Object
Pagination1 v
ID Numbers
Open LibraryOL19297817M

Recombination of Ions and Electrons the formation of neutral atoms or molecules from free electrons and positive atomic or molecular ions; it is a process inverse to ionization. Recombination occurs primarily in ionized gases and in plasmas and, in the absence of counteracting factors, results in the almost complete disappearance of charged particles. The dielectronic recombination is a resonant process, because of the discrete energy nature of the bound electron orbits. Both radiative and the dielectronic recombination are important capture processes which play a dominant role in determining the charge state balance of highly ionized astrophysical and laboratory plasmas.

  The requirements for exploring the role of vibrations in reactions on surfaces are analogous to those for gas phase studies: the ability to prepare reactants, in this case a well characterized single crystal surface and a beam of vibrationally excited molecules, and a means of detecting the reaction of the vibrationally excited molecule. Get this from a library! Dissociative Recombination of Molecular Ions with Electrons. [Steven L Guberman] -- Dissociative Recombination of Molecular Ions with Electrons is a comprehensive collection of refereed papers describing the latest developments in dissociative recombination research. The papers are.

Dissociative recombination (DR) of molecular ions with free electrons is an elementary reactive collision that is highly sensitive to vibrational excitation. In many partly ionized gas-phase environments, the process removes charged particles and produces neutral fragments carrying considerable kinetic energy and often also internal excitation. The Dissociative Recombination of N2+.- Dissociative Recombination of Slow Electrons and Molecular Oxygen Ions in a Strong Laser Field.- Dissociative Recombination of c-C3 H3+.- H3+ Theory and Experiment*.- Help!!! Theory for H3+ Recombination Badly Needed.- Importance of Jahn-Teller Coupling in the Dissociative Recombination of H 3+ by Low.


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Ion-electron dissociative recombination in vibrationally excited gases by Augustine James Cunningham Download PDF EPUB FB2

Dissociative recombination of vibrationally excited HD^+: State-selective experimental investigation Article (PDF Available) in Physical Review. Cosby P.C., Peterson J.R., Huestis D.L. () Dissociative Recombination of Vibrationally Excited Levels in Oxygen Molecular Ions.

In: Guberman S.L. (eds) Dissociative Recombination of Molecular Ions with by: 1. Cambridge Core - Atomic Physics, Molecular Physics and Chemical Physics - Dissociative Recombination of Molecular Ions - by Mats LarssonCited by: excitation, dissociative recombination and dissociative excitation cross sections of ro-vibrationally excited BeH + ion To cite this article: V Laporta et al Plasma Phys.

Control. Fusion 59 View the article online for updates and enhancements. Related content State-to-state electron impact cross sections for BeH+ molecular ions in ITER-Cited by: 8.

The production of metastable O(¹S) atoms by the dissociative recombination of O 2 + ions has been studied in a laboratory plasma spectroscopy experiment. The specific dissociative recombination coefficient for O(1 S) formation has a value of × 10 −8 cm 3 s −1, corresponding to an O(¹S) quantum yield of 10% at an apparent temperature of °K, in Cited by: Dissociative recombination of N + 2, O + 2 and N O + The dissociative recombination (DR) of the molecular ions, which is the subject of a very.

Ab initio molecular orbital calculations have been performed on potential energy surfaces associated with products of dissociative recombination (DR) of H3O+ + e- experiments carried out in the ASTRID heavy-ion storage ring.

Gradient geometry optimizations and frequency calculations on critical points on the H3O ground-electronic-state surface and its dissociation. gas dependence is attributed to recombination of ground-state ions, while the T− gas dependence is associated with recombination of vibrationally excited ion states (see also [13]).

The very recent theoretical calculations of the dissociative recombination coefficient of Ar+ 2 ions by Royal and Orel [8] showed that their calculated values. We estimate the number density of highly vibrationally excited water (H 2 O *) produced via dissociative recombination as follows: equating the production and loss rates for H 2 O * in the expanding plasma yields (2) k f [H 3 O + (H 2 O) n] [e −]=[H 2 O *]/t, where k f is the recombination constant (∼10 −7 cm 3 s −1 for n=0), t(∼ 31, 32, 33] brought a revolution in the electron-ion recombination studies.

These devices are successfully utilized to investigate reactions between elec-trons and ions such as RR, DR, laser induced recombination, and dissociative recombination with high resolution [34, 35].

In these experimental facilities. Dissociative recombination (DR) is the primary mechanism for electron loss in ionized, low-pressure molecular gases and plasmas, such as planetary ionospheres.

Through the use of heavy ion storage rings, there has been considerable progress in recent years in characterizing both the cross sections and the products produced by DR reactions. DR can in principle be. Volumenumber 4 CHEMICAL PHYSICS LETTERS 28 February OBSERVATION OF THE FOURTH POSITIVE SYSTEM OF CO IN DISSOCIATIVE RECOMBINATION OF VIBRATIONALLY EXCITED CO^ F.

VALLEE a, B.R. ROWE b, J.C. GOMET a, J.L. QUEFFELEC a and M. MORLAIS a " Departement de Physique Atomique et. 1. Introduction [2] In spite of significant advances in ionospheric modeling, some basic chemical reaction rates are still surrounded with uncertainty.

In part, this is due to the apparently contradictory results presented by various earlier studies. The dissociative recombination (DR) of the main terrestrial ionospheric molecular ions, N 2 +, O 2 +, and NO.

Dissociative recombination is a process where a positive molecular ion recombines with an electron, and as a result, the neutral molecule reaction is important for extraterrestrial and atmospheric chemistry.

On Earth, dissociative recombination rarely occurs naturally, as free electrons react with any molecule (even neutral molecules) they encounter. Observation of Dissociative Recombination in the Hydrogen Sheet Plasma ONO Masataka, TONEGAWA Akira, KUMITA Kentaro, YAZAWA Hiroyuki, with hydrogen gas puffat various discharge current.

An“omegatron ”mass-analyzer, situated behind a nation with vibrationally excited hydrogen molecules H 2(v). Dissociative Recombination of Molecular Ions with Electrons is a comprehensive collection of refereed papers describing the latest developments in dissociative recombination research.

The papers are written by the leading researchers in the field. The topics covered include the use of microwave afterglows, merged beams and storage rings to measure rate coefficients and to. The yield for v =0 radicals was determined relative to the known OH yield from the recombination of H 3 O + ions while the production of vibrationally excited OH in v=1 was obtained relative to that in v=0 by comparing LIF spectra.

Abstract. The shock-heated molecular-beam technique was used to obtain vibrationally excited oxygen molecules. The vibrational distributions of these diatomic molecules, in argon gas as the ''carrier'' gas of a shock-heated molecular beam, have been calculated by considering atomic recombination, collisional excitation, and deexcitation during the expansion.

Dissociative electron attachment to vibrationally excited H 2 molecules involving the 2Rþ g resonant Rydberg electronic state R. Celibertoa,b,⇑, R.K. Janevc,d, J.M. Wadehrae, J. Tennysonf a Department of Water Engineering and Chemistry, Polytechnic of Bari, Bari, Italy bInstitute of Inorganic Methodologies and Plasmas, CNR, Bari, Italy cMacedonian Academy of.

Dissociative recombination rate constants are reported with electron temperature dependent uncertainties for the lowest 5 vibrational levels of the N{sub 2}{sup +} ground state.

The rate constants are determined from ab initio calculations of potential curves, electronic widths, quantum defects, and cross sections.

We used the multichannel quantum defect theory to compute cross sections and rate coefficients for the dissociative recombination of CH + initially in its lowest vibrational level v i + = 0 with electrons of incident energy below eV. We have focused on the contribution of the 2 2 Π state which is the main dissociative recombination route at low collision energies.Keywords: dissociative recombination, electron impact vibrational excitation, vibrationally excited, multichannel quantum defect theory (Some figures may appear in colour only in the online journal) J Z Mezei et al Dissociative recombination, and vibrational excitation of CO +: model calculations and comparison with experiment Printed in the.

An advanced model for the calculation of electron energy distribution functions (eedfs), vibrational distributions, and electronic excited state densities of reacting CO 2 in microwave (MW) discharges has been developed for clarifying: (1) the role of electronic states of the relevant neutral species in affecting the eedf and (2) the contribution to the CO 2 .