Solution of Dirac equation for Eckart potential and trigonometric Manning Rosen potential using asymptotic iteration method
Arum Sari Resita, Suparmi A, Cari C
       

(a), (b) Two-dimensional and (c), (d) three-dimensional representations of the anglar wave function for a statenl= 4. In panels (a) and (b),Q(θ) = 1.57638(1.5865 + 16.793(−1 + cos(θ)) + 42.105(−1 + cos(θ))2+ 36.695(−1 + cos(θ))3+ 10.215(−1 + cos(θ))4)2(1−cos(θ))0.2(1 + cos(θ))1.16; in panels (c) and (d), (θ) = 1.57638(6.7983 + 39.2793(−1 + cos(θ)) + 67.9901(−1 + cos(θ))2+ 45.3199(−1 + cos(θ))3+ 10.2495(−1 + cos(θ))4)2(1−cos(θ))1.4(1 + cos(θ))0.27.