Data from ${}_{}{}^{204}{}_{}{}^{}\mathrm{Pb}$(p,p’${)}^{204}$Pb conversion-electron and gamma-ray experiments, together with previous results, prove the existence of two levels ($0^{+}$ and $2^{+}$) at 1583-keV excitation energy in ${}_{}{}^{204}{}_{}{}^{}\mathrm{Pb}$. Modified values (limits) of the ${\rho }_{21}^2$ and $X_{211}$ are 0.0013<${\rho }_{21}^2$<0.015 and $X_{211}$>0.073. New experimental evidence indicates that all the three observed excited $O^{+}$ states in ${}_{}{}^{204}{}_{}{}^{}\mathrm{Pb}$ can be explained as belonging to the four-neutron-hole valence space and, therefore, there is no clear candidate for the proton 2p-2h intruder state in this nucleus.

• Received 8 May 1989

DOI:https://doi.org/10.1103/PhysRevC.40.1520