The ligands must also be small to provide high Coulombenergy.
配体还必须很小，以提供高的库仑能。
2
It is found that the exchange part of Coulombenergy can be expressed in the usually used formulae with different coefficients.
研究结果表明：核的库仑能的交换项的常用公式要乘上一个校正系数。
3
The Hamiltonian of sodium atom is reduced by using screening Coulomb potential, and the energy levels of sodium atom are calculated by means of twofold perturbation.