Coulomb-nuclear interference and extraction of nuclear parameters

K. M. Das and B. B. Deo
Phys. Rev. C 26, 211 – Published 1 July 1982
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Abstract

A novel method of separating strong and electromagnetic contributions to the charge particle scattering on nuclei is presented. Data from nonforward angles are extrapolated to the forward angle to obtain the residue of the Coulomb pole which is proportional to the forward nuclear amplitude fN(0). Except for the treatment of the Coulombic effects, the method is model independent. Optical polynomial expansion is used to improve the goodness of the fits. Reliable values of the total elastic, total inelastic, and total nuclear scattering cross sections can be obtained. The method is applied to study the elastic scattering of charged pions from He4 nuclei. The differential cross-section results of Binon et al. at five energies ranging from 110 to 260 MeV and of Crowe et al. at four energies ranging from 51 to 75 MeV are separately analyzed. The extracted results agree, not only with those of Binon et al., but also with the values of real parts of the forward scattering amplitude obtained by Wilkin et al. and Batty et al. using forward dispersion relations.

NUCLEAR REACTIONS He4(π±, π±), Tlab=5175 MeV; He4(π, π), Tlab=110260 MeV; calculated forward nuclear amplitudes, elastic, inelastic, total σ; pole extrapolation method.

  • Received 5 March 1981

DOI:https://doi.org/10.1103/PhysRevC.26.211

©1982 American Physical Society

Authors & Affiliations

K. M. Das and B. B. Deo

  • Department of Physics, Utkal University, Bhubaneswar-751004, India

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Vol. 26, Iss. 1 — July 1982

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