The neutron and proton two-particle nucleus \chem{^{134}Sb}: New low-spin states observed in the decay of \chem{^{134}Sn} and an estimate of the energy of the \mth{7^-} isomer

Excited states in the \chem{^{134}Sb} nucleus, populated in the ${\beta}^-$-decay of \chem{^{134}Sn}, have been studied at the mass separator OSIRIS. The \chem{^{134}Sn} activity was produced via fast neutron-induced fission of \chem{^{238}U} target. A main result was the discovery of a very low-lying first-excited state of \chem{^{134}Sb}, at 13 keV, which has led to a strong revision of the level scheme. The new results are compared with different theoretical calculations and with the known data for the analogous neutron and proton two-particle nucleus in the \chem{^{208}Pb} region. On the basis of this comparison, the energy of the ($\pi g_{7/2}\nu f_{7/2}$)$_{7^{-}}$ isomer is estimated to be about 250 keV, some 100 keV lower than previously reported

A new μs isomer in ¹³⁶Sb produced in the projectile fission of ²³⁸U

The neutron-rich isotope 136Sb has been produced following the relativistic projectile fission of 238U in an experiment performed at the Fragment Separator at GSI, Darmstadt. Delayed γ-ray spectroscopy of the fission products has been performed after isotope separation. A new isomeric state in 136Sb has been populated, and its lifetime measured as T1/2 = 565(50) ns. Realistic and empirical shell-model calculations have been performed and are compared to the experimental observables

A new μs isomer in 136Sb^{136}Sb produced in the projectile fission of 238U^{238}U

The neutron-rich isotope 136Sb has been produced following the relativistic projectile fission of 238U in an experiment performed at the Fragment Separator at GSI, Darmstadt. Delayed γ-ray spectroscopy of the fission products has been performed after isotope separation. A new isomeric state in 136Sb has been populated, and its lifetime measured as T1/2 = 565(50) ns. Realistic and empirical shell-model calculations have been performed and are compared to the experimental observables

A New us Isomer in 136Sb Produced in the Projectile Fission of 238U

The neutron-rich isotope Sb-136 has been produced following the relativistic projectile fission of U-238 in an experiment performed at the Fragment Separator at GSI, Darmstadt. Delayed gamma -ray spectroscopy of the fission products has been performed after isotope separation. A new isomeric state in Sb-136 has been populated, and its lifetime measured as T-1/2 = 565(50) ns. Realistic and empirical shell-model calculations have been performed and are compared to the experimental observables