We have used the ${}^{48}{\mathrm{C}\mathrm{a}+}^{176}\mathrm{Yb}$ reaction to study the population of high-spin states in neutron-rich nuclei by deep-inelastic reactions. Using Gammasphere, we observed gamma transitions from nuclei several neutrons richer than the target. Yrast states with spin up to 20 were populated in this reaction. High-spin states in ${}^{175,177,178}\mathrm{Yb}$ were observed. In this region of reduced pairing, a reference based on experimental data was used to derive experimental Routhians. Systematics of experimental Routhians in neutron-rich Yb nuclei compare well with cranked shell-model calculations.

• Received 24 February 1997

DOI:https://doi.org/10.1103/PhysRevC.56.753