Triaxial Nuclei Floppy or Rigid?

Triaxial nuclear shapes are interesting since they are so unusual in the nuclear chart.But whether the triaxial nuclei are soft or rigid in shape is still a question.Softness of triaxial nuclei has primarily been studied in even-even nuclei. We study softness of triaxiality in odd-mass nuclei, using the Core Quasi-Particle Model coupling an even-even core in Algebraic Collective Model with a quasi-particle in the spherical field. We want to know if the quasi-particle outside of the core will influence the rigidness of the core or not? And how the quasi-particle influences the core's properties.