The neutron excess distribution in 208Pb

Sinha, B. C. ; Edwards, V. R. W. (1970) The neutron excess distribution in 208Pb Physics Letters B, 31 (5). pp. 273-276. ISSN 0370-2693

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It is shown that adding a derivative Saxon Woods term to the real part of the optical potential to represent the symmetry potential arising from the excess neutrons greatly improves the fits to the elastic scattering of 30.3, 40.0 and 61.4 MeV protons from 208Pb. The depth and geometry of the best fit derivative term are found to be consistent with:- (i) the cross sections for the 208Pb (p,n)208Bi reaction at 30 and 50 MeV; (ii) the Coulomb displacement energy of 208Pb and (iii) the strength of the isospin dependent component of the effective two nucleon force.

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