The total single ionization cross sections of alkali-metal atoms (Li, Na, K, Rb, and Cs) have been calculated in the binary-encounter approximation (BEA) using the Hartree–Fock velocity distribution function for the bound electron. The calculated cross sections are compared with the experimental data. The BEA results agree with the observations to within a factor of 2–3.
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Tiwary et al. (1978) studied this question.
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