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Approximate Energies of the 1s2p-state of Helium by the Finite Element Method
ZHENG Wei-ying, YING Lung-an
CHINESE JOURNAL OF COMPUTATIONAL PHYSICS
2003, 20 (2):
119-122.
The finite element method is used to obtain numerical solutions of the Schrödinger equation for the Helium 1s2p-state. The relative errors of approximate energies are 10-6 for triplet and 10-4 for singlet which are slightly smaller than J. Shertzer's results for the Helium ground state[9]. The generalized eigenvalue problems obtained by FEM are symmetric for the ground state but unsymmetric for 1s2p-state. It becomes more difficult to solve the problems. Form the graphs of wave functions, it can be seen that it is reasonable to solve the Schrödinger equations in bounded domains.
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