Two-dimensional collective Hamiltonian for chiral and wobbling modes. II. Electromagnetic transitions

We calculate the intraband electromagnetic transitions in the framework of a collective Hamiltonian for chiral and wobbling modes. By going beyond the mean-field approximation on the orientations of the rotational axis, the collective Hamiltonian provides descriptions of both the yrast band and collective excitation bands. For a system with one h11/2 proton particle and one h11/2 neutron hole coupled to a triaxial rotor (γ=-30), the intraband electromagnetic transitions given by the one-dimensional and two-dimensional collective Hamiltonian are compared with results obtained by using the tilted axis cranking approach and the particle rotor model. Compared with the tilted axis cranking approach, the electromagnetic transitions given by the collective Hamiltonian agree better with the transitions obtained by using the particle rotor model because quantum fluctuations are considered.