2012Ku26: ¹⁷⁷Er produced and identified in ⁹Be(²³⁸U,F), E=1 GeV/nucleon reaction using SIS-18 synchrotron facility at GSI. Target=1.6 g/cm^{2 9}Be placed at the entrance of projectile Fragment Separator (FRS). Particle identification was achieved by event-by-event in-flight analysis of time-of-flight, energy loss measurement, and magnetic rigidity (tof-ΔE’-Bρ), measured using two plastic scintillation detectors, ionization chambers (MUSIC) and four time-projection chambers (TPC), respectively. Isomer tagging method for known μs isomers was used to verify event-by-event identification and in-flight separation of new isotopes. Gamma rays from known isomers were recorded in coincidence with the incoming ions using either the RISING array of Ge detectors or only two Ge detectors, a stopper foil and a scintillator for veto signal. Measured production cross section.