# Collision broadening of spectral lines by neutral atoms, (Progress in quantum electronics) (Vol 2) ePub download

## by W. R Hindmarsh

**Author:**W. R Hindmarsh**ISBN:**0080168817**ISBN13:**978-0080168814**ePub:**1274 kb |**FB2:**1522 kb**Language:**English**Publisher:**Pergamon Press; 1st edition (1972)**Pages:**214**Rating:**4.3/5**Votes:**879**Format:**mbr docx doc azw

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Farr: Collision Broadening of Spectral Lines by Neutral Atoms, in Progress in Quantum Electronics, vol. 2, part 4, ed. by J. H. Sanders, S. Stenholm (Pergamon Press, Oxford 1973)Google Scholar. 6,283 (1975)Google Scholar. B. D. Fried, S. Conte: The Plasma Dispersion Function (Academic Press, New York 1961)Google Scholar.

Hindmarsh, Judith M. Farr. Published: 1 January 1973. by Elsevier BV. in Progress in Quantum Electronics. Progress in Quantum Electronics, Volume 2, pp 141-214; doi:10. 1016/0079-6727(73)90005-0. Cited by 22 articles.

PDF A spectral line emitted by an atom or molecule (throughout the article, spectral . Collision Broadening of Spectral Lines by Neutral Atoms. In this paper, we shall discuss some recent progress on our understanding of the physical processes associated with such events.

PDF A spectral line emitted by an atom or molecule (throughout the article, spectral lines seen in emission ere described; however, the theory applies.

Broadening of Spectral Lines. There is always a finite width to the observed spectral lines

Broadening of Spectral Lines. In the study of transitions in atomic spectra, and indeed in any type of spectroscopy, one must be aware that those transitions are not precisely "sharp". There is always a finite width to the observed spectral lines. One source of broadening is the "natural line width" which arises from the uncertainty in energy of the states involved in the transition. From the Boltzmann distribution, the number of atoms with velocity v in the direction of the observed light is given by. The distribution of radiation around the center frequency is then given by. This is in the form of a Gaussian, and the width at half-maximum is given by.

A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from emission or absorption of light in a narrow frequency range, compared with the nearby frequencies. Spectral lines are often used to identify atoms and molecules.

Journal Volume: Vol: 140; Other Information: Orig. Collision broadening studies were made of optical double resonance lines in cadmium. Receipt Date: 31-DEC-66. The collisional self-broadening and shift of neutral argon spectral lines have been determined as a function of atom density N for several lines terminating on either the lower resonance or lower metastable levels. The results indicate that the DELETE ABSTRACT 18574.

Quantum Electronics, Vol. 3, ed. by . In: Progress in Optics 16 (North-Holland, Amsterdam 1978) p. 413 96. . Farr: ‘Collision broadening of spectral lines by neutral atoms’. Godwin (Academic, New York 1975) 90. Bennett: The Physics of Gas Lasers (Gordon and Breach, New York 1977) 91. R. Moore: ‘Atoms in dense plasmas’. In: Atoms in Unusual Situations, ed. Quantum Electronics, Vol. Stenholm (Pergamon, Oxford 1973) 97.

Physical phenomena that broaden the spectral lines are essentially the following . The last phenomenon that causes broadening of spectral lines is the collisions between excited atoms which can become.

Physical phenomena that broaden the spectral lines are essentially the following: Quantum mechanical uncertainty, ΔE, of the energy value E of atomic levels with not infinity lifetime : natural broadening. This is one of the basic principles of quantum mechanics, and is characteristic of particle waves behavior. The principle, in its energy-time version, states that in a physical phenomenon the product of the uncertainties ΔE and Δt assumes the minimum value: ΔEΔt ~ h/2π. The last phenomenon that causes broadening of spectral lines is the collisions between excited atoms which can become predominant in high-density gas plasma emissions (high pressures).

Vainshtein L A, Sobel’man I I, Yukov E A Vozbuzhdenie Atomov i Ushirenie Spektral’nykh Linii (. Nauka, 1979); Sobelman I I, Vainshtein L A, Yukov E A Excitation Of Atoms And Broadening Of Spectral Line (Berlin: Springer-Verlag, 1981). Stolterfoht N, DuBois R D, Rivarola R D Electron Emission In Heavy-Ion-Atom Collisions (Springer Series on Atoms + Plasmas) Vol. 20 (Berlin: Springer, 1997). Cantrell C D, Scully M O Progress In Lasers And Laser Fusion (Studies in the Natural Sciences) Vol. 8 (Eds A Perlmutter, S M Widmayer) (New York: Plenum Press, 1975) p. 147. Rocca J J Rev. Sci.