New decay scheme of the $^{136}_{51}Sb_{85}$ 6$^−$ isomer

We report new data on the Sb1366− yrast isomer with T1/2=489(40) μs and πg7/21×νf7/23 configuration, populated in the projectile fission of U238 on a Be9 target. The analysis confirms the lifetime, providing a good accuracy measurement. In addition, the decay of the isomer to the ground state is newly suggested. Our result for the isomeric decay scheme is in a good agreement with shell-model calculations.