Physics – Mathematical Physics
Scientific paper
2010-01-22
Appl. Math. Com. 216, 545(2010)
Physics
Mathematical Physics
24 pages
Scientific paper
We study the effect of spatially dependent mass function over the solution of the Dirac equation with the Coulomb potential in the (3+1)-dimensions for any arbitrary spin-orbit $\kappa $ state$.$ In the framework of the spin and pseudospin symmetry concept, the analytic bound state energy eigenvalues and the corresponding upper and lower two-component spinors of the two Dirac particles are obtained by means of the Nikiforov-Uvarov method, in closed form. This physical choice of the mass function leads to an exact analytical solution for the pseudospin part of the Dirac equation. The special cases $% \kappa =\pm 1$ ($l=\widetilde{l}=0,$ i.e., s-wave)$,$ the constant mass and the non-relativistic limits are briefly investigated.
Ikhdair Sameer M.
Sever Ramazan
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