Elsevier

Annals of Physics

Volume 34, Issue 1, August 1965, Pages 96-152
Annals of Physics

Elastic scattering of 10.5- and 14.5-MeV polarized protons from nuclei and the optical model potential at intermediate energies

https://doi.org/10.1016/0003-4916(65)90042-4Get rights and content

Abstract

The results of extensive measurements of the angular distributions and azimuthal asymmetries for elastic scattering of 10.5 and 14.5 MeV polarized protons, from a wide range of nuclei, are presented. Attention is focused on the general features of these angular distributions and certain deviations from the general trends. The interpretations of both these aspects of the data are discussed. In addition, results are presented from an extensive search program designed to obtain fits to the data with a six-parameter local “optical” potential. From these individual fits to each nuclide have been obtained a set of average parameters at 10.5 MeV and another set at 14.5 MeV. The predictions of the optical model with the average parameters are compared not only to the polarization data but also to elastic differential cross sections and reaction cross sections for protons. With a modification of the magnitudes of the refractive and absorptive central potentials, as required to fit 14.5 MeV neutron elastic scattering cross sections, the potential has been used to predict differential elastic cross sections, reaction cross sections, total cross sections, and polarizations for neutrons, and the results compared with available experimental data. A study has been made of the dependence of the refractive central potential depth on proton energy and on the nuclear symmetry parameter, (N−Z)A, obtaining reasonable agreement with the results of other workers.

References (44)

  • F. Perey et al.

    Nucl. Phys.

    (1962)
  • G.W. Greenlees et al.

    Nucl. Phys.

    (1963)
  • G. Brown

    Unified Theory of Nuclear Models

  • R.D. Albert et al.

    Phys. Rev. Letters

    (1961)
  • “Neutron Cross Sections,” BNL-325, (Sigma Center, Brookhaven National...
  • A.M. Lane

    Phys. Rev. Letters

    (1962)
    A.M. Lane

    Nucl. Phys.

    (1962)
  • H.A. Bethe

    Phys. Rev.

    (1940)
  • H. Feshbach et al.

    Phys. Rev.

    (1954)
  • H.H. Barschall

    Phys. Rev.

    (1952)
  • F. Bjorklund et al.

    Phys. Rev.

    (1958)
  • F.G. Perey

    Phys. Rev.

    (1963)
  • J.H. Williams

    Phys. Today

    (1964)
  • M.G. Mayer

    Phys. Rev.

    (1948)
  • C.F. Hwang et al.

    Phys. Rev.

    (1963)
  • R.W. Bercaw et al.

    Bull. Am. Phys. Soc.

    (1964)
  • A.B. Robbins et al.

    Phys. Rev.

    (1963)
  • L. Rosen et al.

    Phys. Rev.

    (1961)
  • L. Rosen et al.

    Phys. Rev.

    (1961)
  • H. Feshbach

    Ann. Rev. Nucl. Sci.

    (1958)
    H. Feshbach

    Nuclear Spectroscopy

  • P.B. Jones

    The Optical Model in Nuclear and Particle Physics

    (1963)
  • Cited by (258)

    • Nuclear matter parameters and optical model analysis of proton elastic scattering on the doubly magic nucleus <sup>40</sup>Ca

      2018, Nuclear Physics A
      Citation Excerpt :

      Because of its global character, it did not succeed to agree well with experimental data of a given reaction within wide energy range. It was the aim of the present work to use the available experimental data of differential cross section [12] and polarization [13] for proton scattering on the doubly magic spherical 40Ca nucleus between 9 and 22 MeV, to analyze the data using the optical model for best fit to experimental data, and hence refining the OM parameters. Then the refined set of parameters was utilized to extract some nuclear reaction and nuclear matter parameters.

    View all citing articles on Scopus

    Work performed at Los Alamos Scientific Laboratory under the auspices of the United States Atomic Energy Commission.

    Present address: University of California, Berkeley, California.

    View full text