Particle—asymmetric-rotor descriptions ofAg105−109negative parity states

Abstract

The negative parity states of $^{105\ensuremath{-}109}\mathrm{Ag}$ are interpreted according to the generalized particle\char22{}asymmetric-rotor model. In particular, the influence of the different Nilsson proton orbitals (lying near the Fermi level) on the theoretical level spectra and electromagnetic properties is investigated in detail. Furthermore, the analysis of the wave functions of the theoretical levels, and the contributions of their main components in the $B(M1)$ and $B(E2)$ matrix elements, reveals the single particle or collective character of such levels. The best agreement between the theoretical and experimental results is obtained by coupling four Nilsson proton orbitals (numbers 10-13), with main components on ${p}_{\frac{1}{2}}$, ${p}_{\frac{3}{2}}$, ${f}_{\frac{5}{2}}$ subshells, to an asymmetric rotor ($\ensuremath{\epsilon}=0.26$; $\ensuremath{\gamma}=32\ifmmode^\circ\else\textdegree\fi{}$).