Superdeformed Band in Asymmetric N > Z Nucleus, 40Ar and High-Spin States in A = 30 ~ 40 Nuclei

A rotational band with five cascade γ-ray transitions was newly found in 40Ar. The deduced transition quadrupole moment of 1.45+0.49<inf>-0.31</inf> eb has demonstrated this band as having a superdeformed shape of β<inf>2</inf> ∼ 0.5. The structure of the band was discussed in the framework of cranked Hartree-Fock-Bogoliubov calculations and the assignment of multiparticle-multihole configuration has been made.