Orateur
Description
The concept of wobbling excitations of the rigid triaxial rotor is introduced by means of the topology of its classical orbits. The quantum-mechanical restrictions on the moments of inertia are discussed. The consequences of γ softness for the spectroscopic signatures are addressed and the available experimental examples for wobbling excitations based on the ground bands of even-even nuclei are presented.
The concept of transverse and longitudinal wobbling is introduced by means of the topology of the classical orbits of the total angular momentum of the triaxial rotor coupled to one, two, … high-j quasiparticles. Distillation of the topology from the quantal states by means of spin coherent states is demonstrated. The success and the limitations of the quasiparticle+triaxial rotor model will be illustrated by means of selected examples.
The Triaxial Projected Shell Model represents the most microscopic description of wobbling excitations, which avoids ambiguities in the parameter choice and errors due to core-particle exchange terms of the particle rotor model. Examples of the successful application are presented, and the open questions of interpreting the quantal results in terms of concepts of wobbling and quasiparticle excitations in a rotating potential are addressed.
