Yrast spectroscopy of ${}_{60}^{128}{\mathrm{Nd}}_{68}$ and systematics of the $\nu h_{11/2}$ crossing in $A\sim 130$ nuclei

High-spin states in ${}^{128}\mathrm{Ca}$ were populated with the ${}^{92}\mathrm{Mo}$ ${(}^{40}\mathrm{Ca},2p2n)$ reaction at a beam energy of 184 MeV. The previously known ground-state band has been extended to $I^{\pi }{=(34\mathrm{}}^{+})$ and four sidebands were observed. Configuration assignments for these sidebands are discussed based on their alignment behavior. A significant delay of the $\nu h_{11/2}$ crossing frequency is observed in the $A\sim 130$ region, with the largest delays occurring consistently at $N=70.\mathrm{}$ Cranked shell model calculations were performed in order to investigate whether a variation of deformation and/or pairing parameters can account for this phenomenon.