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Saturday, July 18, 2020 | History

2 edition of experimental study of excitation in low-energy He⁺-He collisions found in the catalog.

experimental study of excitation in low-energy He⁺-He collisions

Samuel H. Dworetsky

experimental study of excitation in low-energy He⁺-He collisions

by Samuel H. Dworetsky

  • 147 Want to read
  • 16 Currently reading

Published in [New York?] .
Written in English

    Subjects:
  • Nuclear excitation.,
  • Collisions (Nuclear physics),
  • Helium -- Spectra.

  • Edition Notes

    Statementby Samuel H. Dworetsky.
    Classifications
    LC ClassificationsQC794 .D9
    The Physical Object
    Paginationvi, 192 l.
    Number of Pages192
    ID Numbers
    Open LibraryOL5351180M
    LC Control Number72279391

    An experimental study is reported on the dynamics of the set of energy states below the 5s5p(1P1) state of atomic strontium, namely 1D2, 3DJ, 3P2, 3P1 and 3P0, in the presence of the rare gases He and Ar and at temperatures from to K. These were . Experimental and modeling study of thermal rate coefficients and cross sections for electron attachment to C Dissociative attachment and vibrational excitation in low-energy electron collisions with chlorine molecules. Low-Energy Electron Attachment to C ChemInform , 26 (24) Cited by:

    A coherence study of Li+- He collisions on, e.g., the question of whether two-electron excitation may be described as the result of two independent one-electron processes. In this paper we present results for the experiments (a) and (b), thereby mapping the behaviour of the two important one-electron excitation channels. Experimental data were acquired in a crossed beam experiment at low collision energies, down to the excitation thresholds (at and cm −1, respectively). C-atoms were produced mainly in their ground spin-orbit state, 3 P 0, by dissociation of CO in a dielectric discharge through an Author: Astrid Bergeat, Sébastien B. Morales, Christian Naulin, Jacek Kłos, François Lique.

    the collision, as one can observe the deformation of colliding balls, one can study the outcome of an atomic collision, that is the excitation cross-sections and phase relations of atomic substates. A particularly favourable situation is encountered for the lightest atoms, H and He, where levels with opposite parity are almost degenerate. collisions L Moorman, V van Hoegaerden, J van Eck et al.-Study of the optical emission in Ne+Ne and Ar+Ar collisions in the range 15 to eV V Kempter, F Veith and L Zehnle-Recent citations On mechanism of Ar(3p 5 4p) states excitation in low-energy Ar-Ar collisions S Y Kurskov and A S Kashuba-Excitation cross sections and polarization.


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Experimental study of excitation in low-energy He⁺-He collisions by Samuel H. Dworetsky Download PDF EPUB FB2

The present work is devoted to study of He I excitation in low energy He-He collisions. The purpose of this work is the investigation of mechanisms of atomic levels excitation at collision energies, corresponding the conditions of adiabatic approximation.

The results of the experimental investigation of the excitation cross sections of He I 31P, 33P, 31D. Abstract The present work is devoted to study of He I excitation in low energy He-He collisions.

The purpose of this work is the investigation of mechanisms of atomic levels excitation at collision energies, corresponding the conditions of adiabatic by: 1. Excitation mechanisms in M+ (= Li+, Na+, and K+)‒He collisions at moderate laboratory energies of Elab = ‒5 keV were studied by calculating interaction potentials of V (R) = 10‒ eV at Author: S.

Kita. Transfer excitation in Het+ He collisions the emitter rest frame. Since the kinematic line broadening is reduced to second order at O", spectral lines such as 2s' 'S, 2s2p 3P, 2p2 'D and 2s2p 'P are well obtain transfer excitahon cross sections, the continuum background as shown by a.

In molecular collisions, long-lived complexes may be formed that correspond to quasi-bound states in the van der Waals potential and give rise to peaks in the collision Cited by: The study of the excitation sharing between the 2p levels of He and Li is carried out within the Demkov-Meyerhof model, and excitation of He(1s2s) is explained in analogy with a similar process in the He-He collision.

Analysis of the K-vacancy-sharing process leading to Li(1s2/2l') is undertaken within a many-electron by: The present work has been extended to a study of collision-induced excitation of neon, the results of which are given in the following paper.

Experimental technique and measurements tons emitted from a conventional plasma ion source') were accelerated electrostatically to an energy between 10 keV and 75 keV and then focused with a three-cylinder-lens by: 3.

The present work is devoted to study of Ar(3p54p) states excitation in binary low-energy Ar-Ar collisions. The results of the experimental investigation of excitation cross sections of Ar I 4p'[l. Single and double electron capture in C5++He collisions at energies ranging from 9 to 90 keV have been investigated using recoil ion momentum spectroscopy.

COULOMB EXCITATION IN INTERMEDIATE-ENERGY COLLISIONS A.N.F. ALEIXO and C.A. BERTIJLANI Instituto de Fkica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil Received 24 May (Revised 21 July ) Abstract: We study the interplay between retardation and Coulomb recoil in theory of.

The energy dependence of the cross section for simultaneous excitation of both collision partners to the 33D state in He-He collisions has been measured at incident energies between and keV. An experimental study of proton and deuteron transfer in H+2 + He and HD+ + He has been carried out as a function of kinetic and vibrational energy.

The data gives evidence that at lower kinetic energies, the spectator stripping mechanism indeed plays an important role when H+2 or HD+ is vibrationally excited. The H+2 (v=0) reaction has a much smaller cross section than the v=1–4 reactions Cited by: Excitation functions from collisions between 20Ne+ Fig.

Excitation functions from collisions between ze+, and Ne. 22Ne+ and Ne. EXPERIMENTAL STUDY OE BEAM-GAS COLLISIONS, 11 the 4pTJ=1 level, showing the influence of the different cores on the collision mechanism.

In fig. 5 the excitation of the 4p[12]J=2 level is given both using 2e Cited by: 3. Double excitation of He by impact of high energy protons and bare positive ions has been observed experimentally using electron spectroscopy.

The measured electron spectra show resonance structures associated with the doubly excited states populated in the collision. A complete analysis of the transfer excitation (TE) process is attempted for the collision system S13+ + He in the energy range EL = 5– MeV.

Three Cited by: 4. An experimental study of excitation of He I states in low-energy He' - He collisions was undertaken in the energy range from 5 keV down to the energy conservation thresholds.

Excitation of particular He I states was observed with the use of single-photon counting techniques. The results include the observation of large low-energy cross sections, the measurement of the particular excitation. Recent experiments using polarized electron beams have shown that spin exchange effects for elastic collisions with O2 and NO are much smaller than for Na atoms.

Vibrational Level Vibrational Excitation Excitation Cross Section Hypersonic Flow Dissociative Recombination 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 by: 2.

In the last few decades, the need for a sustainable combustion led to numerous experimental and kinetic modeling studies. The concept of plasma-assisted combustion (PAC) has been suggested and developed [1–8].The use of various types of discharge was investigated including nanosecond pulsed discharges, gliding arcs, microwave, corona, DBDs and plasma torches [].Cited by: 1.

Abstract. The semiclassical theory of atom-atom potential scattering and of low energy inelastic atom-atom scattering is reviewed. Particular attention is given to the origin and interpretation of rainbow structure, diffraction oscillations and exchange oscillations in the potential scattering differential cross-section, and to the glory structure and symmetry oscillations in the integral Cited by: 1.

We present a time-resolved experimental study of ionization by superelastic collisions in excited strontium vapor. Using short duration laser pulses for resonant excitation, we clearly observe that a delay time is necessary to reach runaway collisional ionization after the end of laser by: 5.excitation and photon decay of giant resonances.

1. Introduction There has been considerable interest in recent years in the study of giant resonances through the excitation induced by heavy-ion collisions ’). One important reason for such.Summary This thesis reports on a series of electron scattering experiments with H 2O, made with a high resolution crossed beam spectrometer.

romF the results of those experiments.