αdecay ofPb180,181

Abstract

A detailed $\ensuremath{\alpha}$-decay study of the neutron-deficient isotope $^{181}\mathrm{Pb}$ has been performed in the complete fusion reaction $^{40}\mathrm{Ca}$$+$$^{144}\mathrm{Sm}$$\ensuremath{\rightarrow}$$^{184}\mathrm{Pb}$${}^{*}$ at the velocity filter SHIP (GSI, Darmstadt). In comparison with the literature, more precise data have been deduced for the ${I}^{\ensuremath{\pi}}=(9/{2}^{\ensuremath{-}})$ ground state in this nucleus, which is presumably based on the neutron $\ensuremath{\nu}{h}_{9/2}$ spherical orbital. Improved $\ensuremath{\alpha}$-decay data were also measured for $^{180}\mathrm{Pb}$.