Possible Candidates for Chirality in the Odd-Odd As Isotopes

The deformations and the corresponding configurations of the odd-odd As isotopes are investigated using the adiabatic and configuration-fixed constrained triaxial relativistic mean field（RMF） theory.Energy minima with triaxial deformations and high-j particle-hole configurations are obtained in 72,74,76,78,80 As,where the chiral doublet bands are possible to appear.The existence of multiple chiral doublet（M χ D） is demonstrated in 74,76,78 As.Based on the calculated single-particle levels,we also find possible coexistence of chiral and pseudospin symmetries in the odd-odd As isotopes.