The magnetic dipole collective excitation, known as scissors mode, is studied in odd deformed nuclei within the framework of a particle-core coupling scheme. The description is made in the intrinsic and laboratory frames. In both frames the core is described in the RPA approach by a schematic many body Hamiltonian. In the intrinsic frame we use an effective particle-core Hamiltonian which is treated perturbatively. In the laboratory frame two K = 1/2 triplets with J = 1/2, 3/2, 5/2 are constructed through projection from two intrinsic excited states respectively. Each member of these multiplets are collectively M1 excited from the state (K, J~)=(3/2, 3/2+). Their energies are obtained by averaging a rotationally invariant Hamiltonian. Another multiplet with K = 3/2 and J=3/2, 5/2, which is strongly coupled to the state (K, J~)=(5/2, 5/2 +) through a M1 transition, is described. These results indicate that the M1 collective excitation should exist also in odd deformed nuclei.
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