Higher angular momentum states

At high velocities, v/ve 1, these ion-atom collisions can be described by the Born approximation, and this description leads to a reasonable description of the observed Na nd —> ni results.4 For example, the results of Percival and Richards,4 shown in Fig. 13.3, are obtained by calculating the Born cross section for the nd — nf transition and using a sudden approximation to estimate the redistribution of population among the nearly degenerate higher angular momentum states. 

Why I higher angular momentum state lower In energy ... 

As for the bulk modulus, the LDA well represents its trend across the 4f series, although the absolute errors are quite large (7 A careful analysis of the bulk modulus for the mixed valent metal TmSe indicates that the LDA error in that case can be corrected if the f levels are shifted down 40 mRy (4). This problem is connected to the fact that the LDA does progressively worse for higher angular momentum states (due to probable misrepresentation of the shape of the exchange-correlation hole). Self-interaction corrections may be able to explain this error (9-1OL... 

M. Dunn and D.K. Watson, Phys. Rev. A (1992). Higher angular momentum states in D—dimensions. 

Analytic Continuation of Higher Angular Momentum States to D Dimensions and Interdimensional Degeneracies... 

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