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// Scilab Code Ex4.22: Page-137 (2006)
clc; clear;
rs_a0_ratio = 2.07; // Solid radius to lattice parameter ratio for Al
E_F = 50.1*(rs_a0_ratio)^(-2); // Fermi level energy of Y, eV
// According to Jellium model, h_cross*omega_P = E = 47.1 eV *(rs_a0_ratio)^(-3/2)
E = 47.1*(rs_a0_ratio)^(-3/2); // Plasmon energy of Al, eV
printf("\nThe plasmon energy of Al = %4.2f eV", E);
printf("\nThe experimental value is 15 eV");
// Result
// The plasmon energy of Al = 15.81 eV
// The experimental value is 15 eV
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