Nuclear structure studies of $^{\mathrm{141}}$Ce and $^{\mathrm{147}}$Sm using deep-inelastic collisions

Nuclei with a few valence nucleons outside of the magic numbers are essential for testing the nuclear shell model and gathering information on the residual interactions and energies of single-particle levels. The present work focused on the high-spin structures of $^{\mathrm{141}}$Ce (N $=$ 83) and $^{\mathrm{147}}$Sm (N $=$ 85). These nuclei are not produced by heavy-ion fusion-evaporation or fission reactions, therefore little was known about their high-spin structure. A deep-inelastic reaction using a beam of $^{\mathrm{136}}$Xe incident on a thick target of $^{\mathrm{208}}$Pb was used to populate excited states in the nuclei. The Gammasphere array at Argonne National Laboratory was used to detect the resulting de-excitation -ray transitions. The level schemes of both nuclei were significantly extended to high angular momentum and high excitation energy. In $^{\mathrm{141}}$Ce, this included a number of states built on the i$_{\mathrm{13/2}}$, 1369-keV level. Results of the present analysis will be compared to state-of-the-art shell model calculations.