The chiral doublet bands were claimed to be found in several silver isotopes. In the present study of negative parity bands of the odd-even ${}^{103,105,107}$Ag, by using the principal cranking Nilsson-Strutinsky approach it is demonstrated from the point view of spectroscopy that the nearly degenerate $\Delta I=1$ doublet bands could be built on the same configuration with different signature combination of one unpaired proton and two unpaired neutrons. Combining with the small triaxial deformation calculated ($\gamma <{15}^{\circ }$), the existence of chiral rotation in ${}^{103,105,107}$Ag is strongly questioned. In odd-odd ${}^{106}$Ag, the candidate chiral rotational band which possesses much larger moments of inertia than the yrast band, analogously to similar bands observed in ${}^{105,107}$Ag, is assigned to a configuration with two more neutrons in the $\nu 1h_{11/2}$ orbitals than its yrast partner. Such assignment will almost double the $B\left(E2\right)$ values within the band compared to the yrast band, which is consistent with the primary experimental observation.

• Received 30 July 2013

DOI:https://doi.org/10.1103/PhysRevC.88.034322