Single-particle excitations and possible collective rotation in Rn207

Excited states of Rn207 have been investigated with the Au197(N14, 4n)Rn207 reaction at a beam energies of 78 MeV. The level scheme of Rn207 was revised and expanded considerably by the γ -γ coincidence measurement. A large-scale shell-model calculation was performed for the purpose of improving the understanding of some levels of Rn207. A rotational-like band has been observed in Rn207 and the microscopic three-dimensional tilted axis cranking covariant density functional theory (3DTAC-CDFT) was applied to explain it. The calculated results indicate the weak oblate deformation and emergence of principal axis rotation for Rn207. This band is suggested to be a collective oblate band.