Variety of shapes and a complex shape coexistence in ¹⁸⁷Tl

In this work, we discuss the full level scheme now deduced for ¹⁸⁷Tl and make comparisons with new potential energy surface calculations that can be used, in conjunction with spectroscopic information and observation of characteristic level structures, to deduce the nature of the various shapes that are manifest in ¹⁸⁷Tl. A rich structure of shape coexisting states is now identified beyond the usual spherical, oblate and prolate shapes. These include a well-deformed triaxial band based on the 11/2-[505] proton state, deformed isomeric states based on multi-particle excitations, and an i_13/2 proton band with an enhanced deformation mid-way between the usual prolate shape and the superdeformed shape that is observed in heavier Tl isotopes. This document is composed of an abstract and the slides of the presentation. (authors)