Ma, ZQ (reprint author), CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.
In this Letter, the lowest energies of a D-dimensional helium atom in P-wave, where the total spin of two electrons is I and 0 and the parity is odd and even, are directly calculated from the Schrodinger equation with the finite mass of the helium nucleus, respectively. It is found that the lowest energy level of the P-state with spin zero is higher than that of the state with spin one if the parity and the spatial dimension D are the same, and that I E I of the states with the same angular momentum and the parity decreases as D increases. Moreover, the interdimensional degeneracies are confirmed in the calculation, namely the states P-1,3(e) and D-1,3(o) in three dimensions are degenerated with the states S-3,1(e) and P-3,1(o) in five dimensions. (C) 2004 Elsevier B.V All rights reserved.