Two solvable Hamiltonians for describing the dynamic gamma deformation, are
proposed. The limiting case of each of them is the X(5) Hamiltonian. Analytical
solutions for both energies and wave functions, which are periodic in γ,
are presented in terms of spheroidal and Mathieu functions, respectively.
Moreover, the gamma depending factors of the transition operator can be
treated.Comment: four two column pages, 1 figur