Superposition of configurations wavefunctions have been computed for the ground state and some lower excited states of the first three members of the magnesium isoelectronic sequence. The excited states are all those with configurations involving the low‐lying orbitals 3s, 3p, 3d, and 4s. Multiplet strengths were also computed for all the allowed electric dipole transitions among these states. Only excitations of the outer two valence electrons were included in the multiconfiguration expansion, with the virtual orbitals being derived from a pseudonatural orbital transformation. Comparisons are made with predictions of the Z‐expansion method.
REFERENCES
1.
B. M.
Glennon
and W. L.
Wiese
, “Bibliography on Atomic Transition Probabilities
,” Natl. Bur. Std. Publ.
278
, (1966
).2.
3.
4.
R.
Steele
and E.
Trefftz
, J. Quant. Spectry. Radiative Transfer
6
, 833
(1966
).5.
6.
7.
8.
9.
F. Herman and S. Skillman, Atomic Structure Calculations (Prentice‐Hall, Inc., Englewood Cliffs, N.J., 1963).
10.
11.
12.
C. C. J. Roothaan and P. S. Bagus, Methods in Computational Physics (Academic Press Inc., New York, 1963), Vol. II, p. 47.
13.
a Atomic units are used throughout this paper. Energies are in units of the reduced mass Rydberg, and distances in units of the Bohr radius, 0.52917 Å.
14.
15.
R. D.
Chapman
, W. H.
Clarke
, and L.
Aller
, AstroPhys. J.
144
, 376
(1966
).16.
Recently a level has been found in AlII at 111 640 which appears likely to be a 1S term: V. Kaufman (private communication).
17.
18.
19.
20.
This content is only available via PDF.
© 1967 American Institute of Physics.
1967
American Institute of Physics
You do not currently have access to this content.
