M. Kibler et Yf. Smirnov, COULOMB ENERGY AVERAGED OVER THE NL(N)-ATOMIC STATES WITH A DEFINITE SIGN, International journal of quantum chemistry, 53(5), 1995, pp. 495-499
A purely group-theoretical approach (for which the symmetric group pla
ys a central role), based upon the use of properties of fractional-par
entage coefficients and isoscalar factors, is developed for the deriva
tion of the Coulomb energy averaged over the states, with a definite s
pin, arising from an atomic configuration nl(N). (C) 1995 John Wiley &
Sons, Inc.