Abstract
The neutron-skin thickness in 208Pb was determined by measuring the cross section of the isovector giant dipole resonance (GDR) in inelastic scattering of 196 MeV α-particles. From the comparison of measured and calculated cross sections the relative difference of proton and neutron distribution radii (ΔR pN /R 0) was deduced to be 2.2 ± 1.2%.
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