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2 edition of Excitation of nitrogen by electron impact. found in the catalog.

Excitation of nitrogen by electron impact.

Frances Rosemary Simpson

Excitation of nitrogen by electron impact.

by Frances Rosemary Simpson

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  • 25 Currently reading

Published .
Written in English


Edition Notes

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

The Physical Object
Pagination1 v
ID Numbers
Open LibraryOL19298315M

A Rydberg atom is an excited atom with one or more electrons that have a very high principal quantum number, n. The higher the value of n, the farther the electron is from the nucleus, on g atoms have a number of peculiar properties including an exaggerated response to electric and magnetic fields, long decay periods and electron wavefunctions that approximate, under some. Every single thing and person consists of elements, and this informative series will help young readers understand just how important the elements are and what role they play in the science of chemistry. Enhanced by easy-to-follow diagrams and full-color illustrations, the text explains how elements behave, their individual characteristics and their importance in everyday life.5/5(1).

A nitrogen atom has seven electrons. In the ground state, they are arranged in the electron configuration 1s 2 2s 2 2p 1 x 2p 1 y 2p 1 therefore has five valence electrons in the 2s and 2p orbitals, three of which (the p-electrons) are unpaired. It has one of the highest electronegativities among the elements ( on the Pauling scale), exceeded only by chlorine (), oxygen ( Group: group 15 (pnictogens).   The excitation of light emission of the band of the first negative system of the nitrogen ion by activation of nitrogen molecules using short pulses of fast electrons was studied. The intensity and width of the light response were measured as functions of the duration and amplitude of the exciting current pulse and of the density of nitrogen : V. Zh. Madirbaev, A. E. Zarvin, V. V. Kalyada, N. G. Korobeishchikov.

The red emission from sprites has been independently and unambiguously identified byHampton et al. ()andMende et al. ()as the nitrogen first positive band. The source has been attributed to electron impact excitation from low energy electrons (≈1 eV) in the by: THEORY A. BACKGROUND The primary nitrogen excitation reactions occurring in the collision chamber upon proton (H^) impact for the lines studied in this research are: + N2 + e* (4) + N2 -> N2* + (5) The primary carbon dioxide excitation reactions expected to occur are + CO 2 ^ CO^ + 0 + (6) + CO2 + ('^)* + e“ (7) + CO2 -> + CO2* (8) These.


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Excitation of nitrogen by electron impact by Frances Rosemary Simpson Download PDF EPUB FB2

To use electron impact excitation of ground state atoms most efficiently, the incident electron energy W e should be picked so as to maximize the cross section at the ionization limit, i.e., to maximize σ′(W e).In general these energies are from 10 to eV.

Typical values of σ′(W e) are ∼1 Å 2, and for reference the values of σ′(W e) for the rare gas atoms are given in Table I [6]. An analytic atomic independent particle model (IPM) is utilized for calculating absolute cross sections for the single particle excitations of atomic two parameters of the IPM potential are adjusted to reproduce the experimental values of the absolute energies of the 10 excited states 3s‐7s, 3p‐4p, 3d‐5d, and the 2p ground state.

Cited by: 8. Absolute cross sections have been measured for the excitation of the NI(λλ, and Å multiplets by electron impact on atomic nitrogen.

The λ and λ Å cross sections are large, reaching × 10 −16 and × 10 −16 cm 2 at their peaks, respectively. The magnitude of these cross sections is about a factor of two lower than the values reported Cited by: A11ID 5 IMSTbl All /NSRDS-NBS QCUV25;C.2NBS-PUB-C NBS PUBLICATIONS, 1: :v* 3^ vi?’.

M m T t ' s" ^ a T; u#iuani #axv^!»/a3i»/3»'.* mwmmm. The absolute cross sections for the excitation of the nitrosyl cation Baer-Miescher bands, two nitric oxide bands, and several atomic nitrogen multiplets in the vacuum UV by electron impact on NO.

Cross sections and/or effective collision strengths for the excitation of atomic nitrogen and nitrogen-like ions by electron impact are reviewed. The main sources of data are listed and the recommended data sources are selected for each ion. Cross sections are compared and shown on by: 6.

Abstract We present tables of the excitation cross-sections from the ground and some lower excited states and corresponding collision strengths for electron impact excitation of nitrogen ions of all degrees of ionization for an energy range from threshold up to 50 times the threshold energy for direct transitions, and for exchange transitions up to 12 times the threshold energy.

Excitation of electronic states of the N2 molecule by electron impact is recognized as an essential process in nitrogen plasmas that strongly impacts their chemical reactivity and other properties.

Electron impact excitation and ionization cross sections for N, N, +, O, and O+ are provided. Electron kinetic energies range from threshold to greater than or = 5 MeV. Available experimental and theoretical are summarized and by: 5.

Excitation of atomic hydrogen in initial quantum levels {ital n}{sub {ital i}}=1,2,3 colliding with multiply charged ions with charge states {ital q} from 1 to 26 is investigated in the impact energy range 10 (keV/u)/{ital n}{sub {ital i}}{sup 2} MeV/u, by means of the classical trajectory Monte Carlo, many-state atomic orbital close-coupling, and symmetric eikonal formalisms.

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. abstract = "In order to provide a database for modeling hypersonic entry in a partially ionized gas under non-equilibrium conditions, the electron-impact excitation cross sections of atoms are calculated using a quantum mechanical perturbation by: 1.

Introduction [2] The work reported here establishes accurate cross sections for electron impact ionization‐excitation of N 2 X 1 Σ g + (0) molecules into the N 2 + X 2 Σ g + (v), A 2 Π u (v), and B 2 Σ u + (v) states through analysis of existing extensive published experimental data.

The methodology is based on (1) the calculation of accurate analytic electron impact cross section Cited by: Ab initio calculation of vibrational excitation and de-excitation cross sections of N//2 by low-energy resonant electron impact have been carried out. The calculation includes initial target state in v equals and final target state in v equals Electron-impact excitation of the {ital x} {sup 1}{Sigma}{sub g}{sup {minus}}, {ital y} {sup 1}{Pi}{sub g}, and {ital o}{sub 3} {sup 1}{Pi}{sub u} Rydberg electronic states of the nitrogen molecule has been studied.

Cross sections are measured for excitation of the (0, 0) first negative band by protons in the range to 25, ev and by electrons in the range 45 to 25, ev. Upper limits are given for the very weak proton excitation of the first and second positive by:   Abstract Total ionization cross sections of neutral carbon, nitrogen, and oxygen atoms by electron impact are presented.

In our theory we have included possibilities that (a) some target atoms used in an experiment were in metastable state close to the ground state, (b) excitation-autoionization of 2s2p m exited states may be substantial, and (c) ions produced in experiments may be in excited Cited by: The excitation cross sections of the 2S state of atomic hydrogen at 10 low incident electron energies ( and eV) have been calculated using the variational polarized method.

Nine partial waves are used to get convergence of cross sections in the above energy range. The maximum of the cross section is π a 0 2 at eV which is close to the experimental result ± π Cited by: 2.

Oscillator Strength Excitation Cross Section Dissociative Excitation Electron Impact Excitation Incident Electron Energy These keywords were added by machine and not by the authors.

This process is experimental and the keywords may be updated as the learning algorithm : Swaraj S. Tayal. Electron-Impact Ionization of Atomic Nitrogen Christopher J.

Ciccarino∗ Harvard University, Cambridge, Massachusetts and Daniel W. Savin† Columbia University, New York, New York DOI: /1.T New electron-impact ionization (EII) data are presented for neutral atomic nitrogen. The atom is treated as aFile Size: KB.

1. Electron Impact Excitation Cross Sections of C II. Electron collisional excitation cross sections were calculated for inelastic transitions in C II from the ground state 2s22p 2pO to the excited states 2s2p 4 4p, 2D, n 2 a d S at wavelengths A, A, and A, respectively by including the LS.title = "Improved non-boltzmann modeling for nitrogen atoms", abstract = "At high entry velocity, a significant contribution of the afterbody heating comes from the radiation of atomic nitrogen.

Large uncertainties exist in the prediction of this radiative heating, mainly due to the poor theoretical basis of the underlying physical by: NASA/ADS. The Ionisation of Nitrogen by Electron Impact Smyth, H. D. Abstract. Publication: Proceedings of the Royal Society of London Series A.

Pub Date: August DOI: /rspa Bibcode: RSPSAS full text sources Cited by: