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Keywords:

  • Pseudospin symmetry;
  • Morse potential;
  • Hulthen potential;
  • q-deformed Rosen–Morse potential;
  • Dirac equation;
  • Nikiforov–Uvarov method.

Abstract

The solvability of The Dirac equation is studied for the exponential-type potentials with the pseudospin symmetry by using the parametric generalization of the Nikiforov–Uvarov method. The energy eigenvalue equation, and the corresponding Dirac spinors for Morse, Hulthen, and q-deformed Rosen–Morse potentials are obtained within the framework of an approximation to the spin-orbit coupling term, so the solutions are given for any value of the spin-orbit quantum number κ = 0, or κ ≠ 0.