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 As-72,As-74,As-76,As-78,As-80, where the chiral doublet bands are possible to appear. The existence of multiple chiral doublet (M chi D) is demonstrated in As-74,As-76,As-78. Based on the calculated single-particle levels, we also find possible coexistence of chiral and pseudospin symmetries in the odd-odd As isotopes.