High-spin states inCd109

Levels of ${}_{}{}^{109}{}_{}{}^{}\mathrm{Cd}$ populated by ${}_{}{}^{108}{}_{}{}^{}\mathrm{Pd}(\alpha , 3n\gamma ){}_{}{}^{109}{}_{}{}^{}\mathrm{Gd}$ have been studied by measuring $\gamma$-ray excitation functions, direct $\gamma$ spectra, $\gamma -\gamma$ coincidences, and $\gamma$-ray angular distributions and by performing lifetime measurements. An intense $\gamma$-ray cascade has been observed, built on the ${\frac{11}{2}}^{-}$ intrinsic state and involving states of spin ${\frac{11}{2}}^{-}$, ${\frac{15}{2}}^{-}$, ${\frac{19}{2}}^{-}$, ${\frac{23}{2}}^{-}$, and (${\frac{27}{2}}^{-}$). A decay level scheme is proposed including states up to 4502 keV.