The criteria for chiral doublet bands based on one particle and one hole coupled to a triaxial rotor have been summarized. Two representative cases in $A\sim100$ odd-odd nuclei, nearly degenerate $\Delta I =1$ doublet bands in $^{ 104}$Rh and $^{ 106}$Rh are checked against these chiral criteria. It is shown that $^{ 106}$Rh possesses better chiral geometry than $^{ 104}$Rh, although the energy near degeneracy is achieved in $^{ 104}$Rh in comparison with the constant energy separation of doublet bands in $^{ 106}$Rh.
Categories: nucl-th
