  The intraband electromagnetic transitions in the framework of collective
Hamiltonian for chiral and wobbling modes are calculated. By going beyond the
mean field approximation on the orientations of rotational axis, the collective
Hamiltonian provides the descriptions on both yrast band and collective
excitation bands. For a system with one $h_{11/2}$ proton particle and one
$h_{11/2}$ neutron hole coupled to a triaxial rotor ($\gamma=-30^\circ$), the
intraband electromagnetic transitions given by the one-dimensional and
two-dimensional collective Hamiltonian are compared to the results by the
tilted axis cranking approach and particle rotor model. Compared with the
tilted axis cranking approach, the electromagnetic transitions given by the
collective Hamiltonian have a better agreement with those by the particle rotor
model, due to the consideration of the quantum fluctuations.
