The properties of T = 0 neutron-proton correlations are discussed within the framework of different model calculations. Single-j shell calculations reveal that the T = 0 correlations remain up to the highest frequencies. They are more complex than the T = 1 corrlations and cannot be restricted to L = 0 pairs only. Whereas it may be difficult to find clear evidence for T = 0 pairing at low spins, T=0 correlations are found to induce a new excitation scheme at high angular momenta.
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