Abstract The exact bound state wavefunctions and energy equations of Klein－Gordon and Dirac equations are given with equal scalar and vector potential $s(r)=v(r)=V(r)/2=V_0\tanh^2(r/d)$. The relation between the energy equation and that of relativistic harmonic is discussed.
Received: 18 August 2003
Revised: 24 September 2003
Accepted manuscript online:
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