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2 edition of Electron beam excitation of nitrogen spectra. found in the catalog.

Electron beam excitation of nitrogen spectra.

Philippe Whitaker Francis Gribbon

Electron beam excitation of nitrogen spectra.

by Philippe Whitaker Francis Gribbon

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Published .
Written in English


Edition Notes

Thesis (M.Sc.)--The Queen"s University of Belfast, 1953.

The Physical Object
Pagination1 v
ID Numbers
Open LibraryOL19421162M

The effect of nitrogen addition on the emission intensities of the brightest argon lines produced in a low pressure argon/nitrogen electron beam-generated plasmas is characterized using optical emission spectroscopy. In particular, a decrease in the intensities of the nm and nm lines. The excitation and quenching of Meinel bands by air and nitrogen are also reported. Large intensity enhancements have been observed in the presence of applied magnetic fields. Preliminary observations and explanations of this beam plasma discharge phenomenon are given.

electron promotion will be from the highest occupied molecular orbital (HOMO), left and right beyond the terminal nitrogen atoms, application of the Schroedinger 1 Basic Principles of Fluorescence Spectroscopy. 1 )--S. Absorption) * * * * * Size: KB.   1a) shows a fluorescence spectrum of the central region of the electron beam irradiated area of the sample. The zero phonon line (ZPL) of NV − is clearly visible at by: 3.

Energy-dispersive X-ray spectroscopy (EDS, EDX, EDXS or XEDS), sometimes called energy dispersive X-ray analysis (EDXA) or energy dispersive X-ray microanalysis (EDXMA), is an analytical technique used for the elemental analysis or chemical characterization of a sample. It relies on an interaction of some source of X-ray excitation and a characterization capabilities are due in.   The nitrogen RIXS spectrum shows that each core excited state is primarily coupled to a single valence excitation. The nitrogen peaks are mainly along a diagonal line, indicating that a single particle picture is appropriate for nitrogen excitations, where a core electron is promoted to an unoccupied valence orbital and then an electron from Cited by:


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Electron beam excitation of nitrogen spectra by Philippe Whitaker Francis Gribbon Download PDF EPUB FB2

Electron beam excitation of molecular spectra. Connolly, K. Emeleus, I. Latimer and J. McConkey Abstract. The first page of this article is displayed as the abstract.

For reproduction of material from all other RSC journals and books. 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 Nitrogen by Electron Impact 1 E. Stone and E. Zlpf Department of Physics University of Pittsburgh, Pittsburgh, Pennsylvania Abstract Absolute cross sections have been measured for the excitation of the NI(XXA, A, A, A, A, and 17^3A) multiplets by electro n impact o atomic Size: KB.

In this study the 2nd positive system of nitrogen (2PS N 2) (N 2: C 3 Π u → B 3 Π g) was examined by electron induced fluorescence (EIF) new crossed electron–molecular beam apparatus was used to study this system.

The electron beam of approximately 90 nA produced by trochoidal electron monochromator was colliding with molecular beam in the reaction by: 6. However, they can be excited by an electron beam in a scanning transmission-electron microscope (STEM), taking advantage of the near-field excitation and detection using electron-energy loss (EEL.

Medium resolution spectra of the co> A 2rr lx 2~+ (3,0) subband obtained from excitation of the cold, supersonic CO beam by electrons of (a) eV, (b) eV, and (c) eV energy. MacAdam and Wing used electron impact excitation to produce He Rydberg atoms to study microwave Δℓ transitions [8, 9].Their apparatus is shown in Figure a vapor cell filled with He at a pressure of 10 −3 torr, they excited the He with an electron beam with energy 30–50 eV and currents from 10 to μA.

They used such low currents to avoid the production of many ℓ states by the. The fluorescence spectrum of molecular nitrogen is a band spectrum. In contrast to atomic line spectra, molecular spectra consist of a variety of broad bands. This band structure is caused by the vibrational and rotational movements of the molecular nuclei which modify the energy states of Cited by: Increased nitrogen-vacancy centre creation yield in diamond through electron beam irradiation at high temperature.

For each excitation power, spectra were collected and their average plotted in (b). The same colour legend is used for both plots. Spectra are offset for clarity.

(A colour version of this figure can be viewed online.)Cited by: 4. Abstract. The model proposed by Coe et al. for electron beam excitation of nitrogen is discussed and simplified in a way that facilitates its further application to a larger range of experimental conditions, without affecting its validity in the range where it has proved to be by: 1.

Energy Dispersive X-Ray Spectroscopy. Energy-dispersive X-ray spectroscopy (EDX) is a surface analytical technique where an electron beam hits the sample, exciting an electron in an inner shell, causing its ejection and the formation of an electron hole in the electronic structure of the element.

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.

The Second Edition explores several new applications of EELS developed during the last ten years. Chapters include recent progress in parallel-recording detectors and image-filtering systems as well as spectral fine structure.

This edition also features updated computer programs which will perform spectrum deconvolution and compute partial ionization cross-sections/5(4). Rotational level populations of N2 were measured downstream from the skimmer in beams of pure N2 and in mixtures of N2 with He, Ne, and Ar expanded from room temperature nozzles.

The range of p0D was from 5 to 50 Torr cm. The formation of dimers and higher condensates of beam species was monitored during the runs. The effect of condensation energy release on rotational populations and Cited by: The spectra produced by electronic excitation Units Apparatus for emission.

Electron diffraction Electron diffraction of gases and vapours. S Hints and explanations. S Aromatic hydrocarbons Alcohols Aromatic alcohols Phe. S Nitrogen rule Ring rule Qualitative applications 3/5(5). electron beam increases rapidly with electron energy from 10 eV to approximately 20 eV for most organic compounds (see Figure ), which brackets the range of the ionization energy of most organic compounds.

The energy of the electron beam is reported in electron volts; 1 eV is the energy gained (equivalent to 23 kcal mole−1) by an electron inFile Size: 1MB. Excitation of nitrogen by fast H 3 + ions We have studied in a crossed-beam experiment the electron-impact-induced fluorescence spectrum of N2 in the extreme ultraviolet (euv) at a spectral.

IN controlled electron experiments it has been usually assumed1 that in the emission of the triplet bands of molecular nitrogen, transitions to the Cited by: 9. The emission spectrum of molecular hydrogen produced by electron-impact excitation at eV has been measured in the wavelength range A.

High-resolution, optically thin spectra (delta. Fundamentals and Applications of Laser Induced Breakdown Spectroscopy. This note covers the following topics: Introduction to LIBS, Physics of Laser Induced Breakdown, formation and evolution of Laser Plasmas, Components of LIBS: Lasers, Optics and Detection, Spectrochemical Analysis using Laser Plasma Excitation -Analysis of gases, liquids, solids and particles, Double pulse LIBS-.

A crossed beam double trochoidal electron spectrometer G. Poparić et al Review of Scientific Instruments 69 Crossref ADS. Measurement of absolute differential cross sections for the vibrational excitation of molecular nitrogen by electron impact in the ^{2}Π_{g} shape resonance region.Large-scale plasma produced in nitrogen gas at room temperature and pressures ranging from 4 × to × Pa by high-power laser-induced dielectric breakdown (LIDB) has been investigated.

Time-integrated optical nitrogen gas spectra excited from a CO 2 laser have been measured and analysed. The spectrum of the generated plasma is Cited by: Auger Electron Spectroscopy (AES) Exciting radiation.

Electron beam (Scanning) Signal. Electrons (Spectrometer) UHV vacuum Analysis depth (typically a few nm) SAMPLE. Auger emission.

E. KL2,3 L2,3 ≈ E K – E L2,3 – E L2,3. E = energy of emitted electron. E K = K-shell ionisation energy. E L2,3 = L-shell electron energies.