First observation of the coexistence of multiple chiral doublet bands and pseudospin doublet bands in the A ≈ 80 mass region

Abstract

Two nearly degenerate positive-parity bands with the π g2 9/2 ⊗ ν g−1 9/2 configuration and three nearly degenerate negative-parity bands with the π g9/2(p3/2, f5/2) ⊗ ν g−1 9/2 configuration have been identified in 81Kr. They are interpreted as chiral doublet bands and pseudospin-chiral triplet bands, which is supported by the constrained covariant density functional theory and the multiparticle plus rotor model calculations. The present work reports two new chiral configurations π g2 9/2 ⊗ ν g−1 9/2 and π g9/2(p3/2, f5/2) ⊗ ν g−1 9/2, and the first example of pseudospin-chiral triplet bands involving the π (p3/2, f5/2) pseudospin doublet.