E. U. Condon and G. H. Shortley, The Theory of Atomic Spectra (Cambridge University Press, New York, 1935).
G. Racah, Phys. Rev. 76, 1352 (1949).
R. F. Bacher and S. Goudsmit, Phys. Rev. 46, 948 (1934).
D. R. Layzer, dissertation, Harvard University, Cambridge, Massachusetts (1950).
R. E. Trees, Phys. Rev. 83, 756 (1951); 84, 1089 (1951); 85, 382 (1952).
G. Racah, Phys. Rev. 85, 381 (1952).
G. Racah, Lunds Univ. Arsskr. AVD. 2 50, 31 (1954).
R. E. Trees and C. K. Jørgensen, Phys. Rev. 123, 1278 (1961).
K. Rajnak and B. G. Wybourne, Phys. Rev. 132, 280 (1963).
R. E. Trees, Phys. Rev. 129, 1220 (1963).
J. Sugar, J. Opt. Soc. Am. 53, 831 (1963).
C. W. Nielson and George F. Koster, Spectroscopic Coefficients for the pn, dn and fn Configurations (Technology Press, Cambridge, Massachusetts, 1963).
B. G. Wybourne, J. Chem. Phys. 40, 1457 (1964).
K. Rajnak, J. Chem. Phys. 37, 2440 (1962).
G. F. Koster and C. W. Nielson, a magnetic tape entitled "Energy Matrices for all Configurations of Equivalent ƒ Electrons," Massachusetts Institute of Technology, Cambridge, Massachusetts.
William C. Davidon, "Variable Metric Method for Minimization," Argonne National Laboratory Report, ANL-5990 Rev. (1959). This general procedure has been adapted for spectroscopic problems by T. Clements of our Math and Computing group.
R. E. Trees, J. Opt. Soc. Am. 54, 651 (1964).
R. E. Trees, Phys. Rev. 84, 1089 (1951).
G. Racah, Phys. Rev. 89, 381 (1952).
The present notation for the linear parameters is that of I. The β used by Trees17 is related to the present γ, although they are not identical. Trees's γ is 1/12 of our β.
B. R. Judd, Operator Techniques in Atomic Spectroscopy (McGraw—Hill Book Company, Inc., New York, 1963).
B. R. Judd and I. Lindgren, Phys. Rev. 122, 1802 (1961).
B. R. Judd, Proc. Roy. Soc. (London) A250, 562 (1959). These coefficients also appear in the tabulation of Nielson and Koster.12