Elastic Scattering of Atoms and Molecules in the Thermal Energy Range

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Abstract: the goal of research on elastic scattering of atomic (or molecular) beams is the elucidation of the interaction potential V(r). the present discussion is confined to thermal energy collisions ([less than]1 ev), sensitive primarily to the attractive part of the potential. Studies of the velocity dependence of the differential and total elastic scattering cross sections have yielded information as follows: (1) The functional form of the long-range attraction : V[tilde]-C/r6, from differential cross sections I(0), at low angles: I(0) oc 0-7/3. (2) The attractive potential constant C, from total cross sections: Q oc (C/v)2/5, (3) The depth of the … continued below

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33 pages : illustrations, charts, graphs

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Bernstein, Richard B. (Richard Barry), 1923-1990 1963.

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Abstract: the goal of research on elastic scattering of atomic (or molecular) beams is the elucidation of the interaction potential V(r). the present discussion is confined to thermal energy collisions ([less than]1 ev), sensitive primarily to the attractive part of the potential. Studies of the velocity dependence of the differential and total elastic scattering cross sections have yielded information as follows: (1) The functional form of the long-range attraction : V[tilde]-C/r6, from differential cross sections I(0), at low angles: I(0) oc 0-7/3. (2) The attractive potential constant C, from total cross sections: Q oc (C/v)2/5, (3) The depth of the potential well [epsilon], from the rainbow effect in I(0): 0r=f(1/2mv2/[epsilon). (4) The equilibrium separation rm, from de Broglie interference producing undulations in (I0). (5) the product [epsilon]rm, from extrema in Q(v), and thus rm (from absolute Q's). (6) Observations of m maxima in plots of vQ5/2 vx. v-1 (termed elastic impact spectra) implied the existence of at least m bound states (discrete vibrational levels of zero angular momentum for the composite system).

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33 pages : illustrations, charts, graphs

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Digitized from microopaque cards.

Includes bibliographic references (pages 21-23).

Paper to be presented at the Third International Conference on the Physics of Electronic and Atomic Collisions, London, England, July 26, 1963

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  • Report No.: CONF-186-3
  • Grant Number: AT(11-1)-321
  • SuDoc Number: Y 3.At 7:22/CONF-186-3
  • Accession or Local Control No: metadc1201712
  • Archival Resource Key: ark:/67531/metadc1201712

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  • 1963

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  • Aug. 27, 2019, 3:53 p.m.

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  • Aug. 4, 2020, 4:32 p.m.

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Bernstein, Richard B. (Richard Barry), 1923-1990. Elastic Scattering of Atoms and Molecules in the Thermal Energy Range, report, 1963; Oak Ridge, Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc1201712/: accessed October 5, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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