Updated analysis of the Er170(p,t)Er168 reaction data

More than 200 states up to 4.1 MeV excitation have been populated in $^{168}\mathrm{Er}$ with the $^{170}\mathrm{Er}(p,t)$ reaction at 25 MeV incident energy. About 80 of these states, with ${0}^{+}$ and ${2}^{+}$ assignments, were reported in a previous publication [D. Bucurescu et al., Phys. Rev. C 73, 064309 (2006)]. The present work considerably enriches the knowledge of this nucleus. A multistep coupled-channels analysis of the angular distributions is now presented for all the states observed in this experiment. Spin and parity values between ${0}^{+}$ and ${7}^{\ensuremath{-}}$ are newly assigned for more than 100 states. For the states already reported in the ENSDF database with ${J}^{\ensuremath{\pi}}$ values there is a good agreement with our values. The $^{168}\mathrm{Er}$ nucleus remains one of the best experimentally known nuclei for states with low and medium spins below 4 MeV excitation energy, representing a challenge for future microscopic structure model calculations aiming to disentangle the contributions of different excitation degrees of freedom.