Rotational structures in doubly odd transitional Tl nuclei

Abstract

The reactions were used to populate high spin states in 196Tl. The subsequent prompt and delayed decay has been studied by means of γ-ray spectroscopic techniques. The strongly Coriolis-distorted two-quasiparticle band found in 198Tl has been followed up to significantly higher angular momenta. All special features displayed by this structure have been interpreted in the framework of a model describing a situation in which two non interacting high-j Nilsson-BCS quasiparticles move in the deformed field of an axially and reflection symmetric rotor. In particular it is shown that the pronounced odd-even staggering of the transition energies can be understood as a specific quantal feature associated with the Coriolis interaction.