Abstract
The neutron-deficient nucleus $^{123}\mathrm{La}$ was studied via the $^{92}\mathrm{Mo}(^{40}\mathrm{Ca},2ap)$ reaction at a beam energy of $184\phantom{\rule{0.3em}{0ex}}\text{MeV}$. Previously known bands were extended to a much higher spin, and in two cases the structures are now observed near $40\ensuremath{\hbar}$. In addition, three new sequences were identified and linked into previously known bands. The lowest $(\ensuremath{\pi},\ensuremath{\alpha})=(+,\ensuremath{-}\frac{1}{2})$ structure displays characteristics similar to those of analogous bands in $^{127,129}\mathrm{La}$, which have been proposed as examples of smooth band termination. Cranked Nilsson-Strutinsky calculations were compared with the experimental data in $^{123}\mathrm{La}$ to determine whether this band is approaching a terminating state as well.
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