States in ${}_{}{}^{106}{}_{}{}^{}\mathrm{Cd}$ populated by heavy-ion ($\mathrm{xn}$) reactions interpreted by a two-quasiparticle-plusrotor model

Levels in ${}_{}{}^{106}{}_{}{}^{}\mathrm{Cd}$ were studied using (heavy-ion, $\mathrm{xn}\gamma$) reactions. The experiments included $\gamma$-ray yields as a function of bombarding energy, $\gamma$-ray angular distributions, $\gamma$-ray linear polarizations, and $\gamma -\gamma$ coincidence measurements. The decay scheme, which includes 85 $\gamma$-ray transitions, is similar to those reported for ${}_{}{}^{108}{}_{}{}^{}\mathrm{Cd}$ and ${}_{}{}^{102,104,106}{}_{}{}^{}\mathrm{Pd}$. In addition to the ground-state band, there appear two negative-parity collective bands built on two quasineutron states. The yrast positive-parity states appear dominated by intruder states at $8^{+}$, 3044.23 keV (two-quasiproton), ${10}^{+}$, 4435.08 keV (two-quasineutron), and ${12}^{+}$, 4659.81 keV (four-quasiparticle). The results are compared to calculations from a two-quasiparticle plus slightly deformed rotor model which utilizes a variable moment of inertia.

NUCLEAR STRUCTURE ${}_{}{}^{96}{}_{}{}^{}\mathrm{Mo}$(${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$,$3n\gamma$) at 45 MeV; ${}_{}{}^{97}{}_{}{}^{}\mathrm{Mo}$(${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$,$3n\gamma$) at 45 MeV, ${}_{}{}^{94}{}_{}{}^{}\mathrm{Zr}$(${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$,$4n\gamma$) at 63 MeV: measured $I_{\gamma }\left(E\right({}_{}{}^{13}{}_{}{}^{}\mathrm{C}\left)\right)$, $I_{\gamma }\left(E\right({}_{}{}^{16}{}_{}{}^{}\mathrm{O}\left)\right)$, $I_{\gamma }\left(\theta \right){}_{}{}^{13}{}_{}{}^{}\mathrm{C}$, ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$, $P_{\gamma }\left[{}_{}{}^{16}{}_{}{}^{}\mathrm{O}\right]$, $\gamma -\gamma$ coin [${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$], $\gamma -\gamma$ DCO [${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$]. ${}_{}{}^{106}{}_{}{}^{}\mathrm{Cd}$ deduced levels, $J$,$\pi$,$\gamma$ multipolarity. Rotational model calculations. Enriched targets, Ge(Li) detectors.