212 T TUT Titre? I y PoE ity T T TU ITil T TTT iiit 4 ~~ T — F (K) 2.0 0.01 Lot Lttiit! Lot patel 1.0 0.1 id 100 Fic. 164.—Atomic form factors of H~, He, and Lit [see Eq. (1) of the text] versus the square of momentum transfer in atomic units. T TTT TTT T T7T TTT] TOT tit TO T_T TTTTT ).Or— SL 4 £ wn 4 w _ H™ — He 0.5-- _| = O 0.0} Lit ! ‘ : 0.1 Tol 1.0 L Loa tidal 10 + l Fe ee 100 (Kao)* Fic. 165.—Incoherent scattering functions of H-, He, and Lit (see Eq. (2) of the text] versus the square of momentum transfer in atomic units. computed from a 3-term Hylleraas wave function by shen.“” The integrals for Li* in Table 76 have been used Hurst” are in good agreement with those in Table 75, in the determination of total inelastic-secattering cross values of Sine(K) for Li* calculated by Freeman”are larger than those in Table 75 by ~5% in the region 5 < (Ka)" < 50, but agree reasonably well for (Kay)’ < 5. In He, we found that a larger deviation is Figures 164 and 165, respectively. As is clear from confirming the expectation that the electron correlation is less important in the evaluation of F(K).” The found toward smaller K. Freeman“” used a simple self-consistent-field wave function by Fock and Petra- section reported elsewhere.” The functions F(A) and Sine(K) are plotted in Figure 165, Sino(K) for H” is large, resulting in a large inelastic scattering cross section [see Eq. (6) of Reference 1], and vise versa for Li*. The figures show that H has a “soft” and Li” a “hard” electronic structure compared to that of He. 4.