Short-range correlations as first-order perturbation to the Hartree-Fock method

1969 ◽  
Vol 2 (11) ◽  
pp. 538-540 ◽  
Author(s):  
S. Boffi
Keyword(s):  
Short Range ◽  
Order Perturbation ◽  
First Order ◽  
Hartree Fock ◽  
Short Range Correlations ◽  
First Order Perturbation

Spin–spin interaction in f5 electron configurations

1969 ◽  
Vol 47 (24) ◽  
pp. 2779-2783 ◽  
Author(s):  
Gulzari Malli ◽  
K. M. S. Saxena
Keyword(s):  
Order Perturbation ◽  
Spin Splitting ◽  
Spin Interaction ◽  
Electron Configuration ◽  
Matrix Elements ◽  
First Order ◽  
Hartree Fock ◽  
Splitting Factor ◽  
Complete Matrix ◽  
First Order Perturbation

The complete matrix of the spin–spin interaction for the f5 electron configuration is evaluated for general usage. The results of the diagonal matrix elements are tabulated here in terms of the corresponding spin–spin splitting factor for usage in the first-order perturbation calculations. These are used to evaluate the Hartree–Fock values of the splitting factors for Pm(4f5), Sm3+ (4f5), Tb(4f9), and Dy3+ (4f9).

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