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We give the approximate analytic solutions of the Dirac equations for theRosen-Morse potential including the spin-orbit centrifugal term. In theframework of the spin and pseudospin symmetry concept, we obtain the analyticbound state energy spectra and corresponding two-component upper- andlower-spinors of the two Dirac particles, in closed form, by means of theNikiforov-Uvarov method. The special cases of the s-wave kappa=1,-1 (l=l bar=0)Rosen-Morse potential, the Eckart-type potential, the PT-symmetric Rosen-Morsepotential and non-relativistic limits are briefly studied.

Approximate solutions of the Dirac equation for the Rosen-Morse potential including the spin-orbit centrifugal term