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// Scilab code Exa5.9 : : Page 205(2011)
clc; clear;
a_v = 14; // Volume energy constant, MeV
a_s = 13; // Surface energy constant, MeV
a_c = 0.60; // Coulomb energy constant, MeV
a_a = 19; // Asymmetric energy constant, MeV
A = 202; // Mass number
Z = 82; // Atomic number
dE_by_dN = -8/9*a_s/A^(4/3)-4/3*a_c*Z/A^(4/3)*(1-4*Z/(3*A))-16*a_a*Z/A^2*(1-2*Z/A); // Slope, mega electron volts per nucleon
printf("\nThe slope of alpha decay energy versus atomic number = %7.5f MeV/nucleon", dE_by_dN);
// Result
// The slope of alpha decay energy versus atomic number = -0.15007 MeV/nucleon
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