Angular correlation in He and He-like atomic ions: A manifestation of the genuine and conjugate Fermi holes

作者：Sako Tokuei^*; Paldus Josef; Diercksen Geerd H F

来源：Physical Review A, 2014, 89(6): 062501.

DOI：10.1103/PhysRevA.89.062501

The ground and low-lying singly excited states of the two-dimensional He and He-like atomic ions have been studied by the full configuration interaction method focusing on the angular correlation between the two electrons involved. For small values of the nuclear charge Z(n), the two-electron angular-density distribution for the ground state strongly depends on the two-electron angle phi(-) reaching a peak at phi(-) = 0. This strong dependence on phi(-) strongly decreases with increasing Z(n) along with the decreasing electron-electron interaction. In contrast, the probability-density distribution for the singlet-triplet pair of states of the (1s)(2p) configuration becomes appreciable with increasing Z(n), reaching peaks at phi(-) = 0 and at phi(-) = +/-pi/2 for the singlet and triplet states, respectively. This indicates a preference of the two electrons to be on the same side of the nucleus for the singlet (1s)(2p) P-1 state and on opposite sides of the nucleus for the triplet (1s)(2p) P-3 state. The origin of these angular dependences is rationalized on the basis of the genuine and conjugate Fermi hole concepts.

• 出版日期2014-6-3