  We investigate the approximate bound state solutions of the Schr\"odinger
equation for the PT-/non-PT-symmetric and non Hermitian Hellmann potential.
Exact energy eigenvalues and corresponding normalized wave functions are
obtained. Numerical values of energy eigenvalues for the bound states are
compared with the ones obtained before. Scattering state solutions are also
studied. Phase shifts of the potential are written in terms of the angular
momentum quantum number $\ell$.

Quantum Physics