The chiral geometry of the multiple chiral doublet bands with identical configuration is discussed for different triaxial deformation parameters $\gamma$ in the particle rotor model with $\pi h_{ 11/2}\otimes \nu h_{ 11/2}^{ -1}$. The energy spectra, electromagnetic transition probabilities $B(M1)$ and $B(E2)$, angular momenta, and $K$-distributions are studied. It is demonstrated that the chirality still remains not only in the yrast and yrare bands, but also in the two higher excited bands when $\gamma$ deviates from $30^{ \circ}$. The chiral geometry relies significantly on $\gamma$, and the chiral geometry of the two higher excited partner bands is not as good as that of the yrast and yrare doublet bands.
Categories: nucl-th nucl-ex