A phenomenological spin-orbit and nuclear potential for \chem{^{208}Pb}

A local, state-independent nuclear single-particle potential for \chem{^{208}Pb} was developed by suitably shaping the nuclear central term and the related spin-orbit term of Thomas type. The aim was to reproduce accurately the excitation energies of the known single-particle states in \chem{^{207}Tl}, \chem{^{207}Pb}, \chem{^{209}Bi} and \chem{^{209}Pb} as well as the recently observed dependence of the spin-orbit splittings on angular momentum $\ell$ and principal quantum number $n$. As result, a set of orthogonal proton and neutron wave functions was obtained which were used for a consistent reanalysis of proton and neutron single-particle transfer reactions on \chem{^{208}Pb}. The quality of the description of measured angular distributions is comparable with that obtained originally with individual “best fit” potentials. The resulting single-particle spectroscopic factors amount on the average to $S\approx$ 0.7. Single- particle densities derived from these wave functions are in qualitative agreement with measured charge and mass densities for \chem{^{208}Pb}

STUDY OF DEEPLY-BOUND HOLE STATES IN THE Zr-REGION VIA THE ([MATH], 3He) REACTION

Le trou proton 1f7/2 a été localisé par la réaction ([MATH], 3He) sur 86Kr, 90, 92Zr et 92Mo. Il montre une structure fine très prononcée et une largeur qui augmente avec le carré de son énergie.The complete 1f7/2 proton hole strength has been localized in the ([MATH], 3He ) reaction at 52 MeV. The second moment of the highly structured strength distribution increases with the square of its energy