Exotic Magnetic Properties in ^{17}C

Magnetic dipole transitions in C-17 are investigated by shell model calculations. The important role of the tensor interaction for magnetic dipole transitions in this exotic neutron-rich nucleus is pointed out. The recently observed anomalous quenching of the magnetic dipole transition in 1/2(1)(+) -> 3/2(g.s.)(+) is shown to be well explained by using a modified shell model Hamiltonian that takes full account of the tensor force and monopole corrections in the isospin T = 1 channel. The predicted quadrupole moment of C-17 is smaller than the value obtained by conventional shell model Hamiltonians.