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// Scilab code Exa10.9 : : Page-458 (2011)
clc; clear;
d = 0.1; // Thickness of Fe-54 sheet, Kg per squre metre
M = 54; // Mass number of Fe
m = 1.66e-027; // Mass of the proton, Kg
n = d/(M*m); // Number of nuclei in unit area of the target, nuclei per square metre
ds = 10^-5; // Area, metre square
r = 0.1; // Distance between detector and target foil, metre
d_omega =ds/r^2; // Solid angle, steradian
d_sigma = 1.3e-03*10^-3*10^-28; // Differential cross section, square metre per nuclei
P = d_sigma*n; // Probablity, event per proton
I = 10^-7; // Current, ampere
e = 1.6e-19; // Charge of the proton, C
N = I/e; // Number of protons per second in the incident beam, proton per sec
dN = P*N; // Number of events detected per second, events per sec
printf("\nThe number of events detected = %d events per sec", dN);
// Result
// The number of events detected = 90 events per sec
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