Structure ofLa130at low and medium spins

Low- and medium-spin states of the odd-odd nucleus $^{130}\mathrm{La}$ were studied by in-beam and pulsed-beam $\ensuremath{\gamma}$-ray spectroscopy using the $^{121}\mathrm{Sb}(^{12}\mathrm{C},3n)$ and $^{116}\mathrm{Sn}(^{16}\mathrm{O},pn)$ fusion-evaporation reactions. The decay out of the $\ensuremath{\pi}{h}_{11/2}\ensuremath{\bigotimes}\ensuremath{\nu}{h}_{11/2}$ and $\ensuremath{\pi}{h}_{11/2}\ensuremath{\bigotimes}\ensuremath{\nu}{g}_{7/2}$ rotational structures to the ground state has been elucidated. Spin and parity values have been assigned to most of the newly observed states, as well as to the bandheads of the rotational bands. Two isomeric states were identified and placed in the level scheme, with the characteristics ${J}^{\ensuremath{\pi}}={5}^{+},{E}_{x}=214.0$ keV, ${T}_{1/2}=0.76(9)$ $\ensuremath{\mu}$s and ${J}^{\ensuremath{\pi}}={6}^{+},{E}_{x}=319.1$ keV, ${T}_{1/2}=33(1)$ ns. The magnetic and quadrupole interactions of the ${6}^{+}$ isomeric state have been investigated by the time-differential perturbed $\ensuremath{\gamma}$-ray angular distribution method. The $g$ factor value, $g({6}^{+})=+0.48(3)$, and the quadrupole coupling constant in polycrystalline metallic Sn lattice, ${\ensuremath{\nu}}_{Q}({6}^{+})=37(4)$ MHz, have been derived. The experimental data are compared with the predictions of two-quasiparticles plus rotor model calculations.