DIFFERENCE BETWEEN NEUTRON AND PROTON RADII IN THE CA ISOTOPES
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abstract
We take a close look at the recent analysis of 1 GeV proton scattering on Ca isotopes. Considering the more accurate values of relevant differences of matter and proton rms radii, a value of r n - r p = 0.10 0.03 fm is obtained for 48 Ca. This value is much smaller than those quoted recently and is consistent with Coulomb displacement energies. 1979.