Systematics of Isomeric Configurations in N=77 Odd-Z Isotones near the Proton Drip Line

摘要: The systematics of the $\ensuremath{\pi}{h}_{11/2}\ensuremath{\bigotimes}\ensuremath{\nu}{h}_{11/2}$ and $\ensuremath{\pi}{h}_{11/2}\ensuremath{\bigotimes}\ensuremath{\nu}{s}_{1/2}$ isomeric configurations was studied for odd-Z $N=77$ isotones near proton drip line. decays in $^{140}\mathrm{Eu}$, $^{142}\mathrm{Tb}$, $^{144}\mathrm{Ho}$, $^{146}\mathrm{Tm}$ were measured by means x-ray, \ensuremath{\gamma}-ray, charged particle spectroscopy at Recoil Mass Spectrometer Holifield Radioactive Ion Beam Facility (ORNL). spin parity ${I}^{\ensuremath{\pi}}={8}^{+}$ ${5}^{\ensuremath{-}}$ deduced isomers $^{140}\mathrm{Eu}$ $^{142}\mathrm{Tb}$. New decay schemes established, half-lives ${8}^{+}$ to be 302(4) ns $^{140m2}\mathrm{Eu}$ 25(1) \ensuremath{\mu}s $^{142m2}\mathrm{Tb}$. No evidence expected ${1}^{+}$ ground-state found $^{144}\mathrm{Ho}$ data. proton-emission from restudied. Five transitions assigned two proton-emitting states. 198(3) ms 68(3) values ${I}^{\ensuremath{\pi}}={10}^{+}$ established $^{146m}\mathrm{Tm}$ $^{146\mathrm{gs}}\mathrm{Tm}$, respectively. For first time an odd-odd nucleus, interpretation observed properties structure states made accounting deformation neutron coupling core excitations. A complex wave-function obtained, with dominating components ${10}^{+}$ isomer ground state.