Energy dependence of inelastic proton scattering to the 3¯, 2.614 MeV state in ²⁰⁸Pb

Abstract

The recent work of McDaniels et al. regarding the inelastic excitation of the 3¯ state at 2.614 MeV in ²⁰⁸Pb by protons with energies between 100 and 800 MeV has been expanded with the inclusion of the data at other proton energies down to -35 MeV. It is found that the deformation length, δ, for this state, extracted using the collective distorted-wave Born approximation formalism, remains nearly the same in the energy region between 35 and 800 MeV. Combining the δ values determined from the (p,p') measurements with those obtained from the electromagnetic methods, the ratio of the neutron and proton transition matrix elements (M_n/Mp) has been determined for this state.