diff options
Diffstat (limited to '3717/CH3/EX3.1/Ex3_1.sce')
| -rw-r--r-- | 3717/CH3/EX3.1/Ex3_1.sce | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/3717/CH3/EX3.1/Ex3_1.sce b/3717/CH3/EX3.1/Ex3_1.sce new file mode 100644 index 000000000..eae520e3a --- /dev/null +++ b/3717/CH3/EX3.1/Ex3_1.sce @@ -0,0 +1,19 @@ +// Ex3_1 Page:45 (2014)
+clc; clear;
+t = 2e-06; // Thickness of gold foil, m
+T = 8; // Kinetic energy of alpha-particles, MeV
+rho = 19.3; // Density of gold foil, g/cm-cube
+k = 8.984e+09; // Coulomb's constant, N-Sq.m/Sq.C
+Z = 79; // Atomic number of gold
+Z_prime = 2; // Atomic number of He nucleus
+e = 1.6e-019; // Charge on an electron, C
+A = 197; // Atomic weight of gold
+N = 6.02e+023; // Avogadro's number, atoms/mol
+n = N*rho*1e+06/A; // Number density of atoms, atoms/metre-cube
+b = k*Z*Z_prime*e^2/(2*T*1e+06*e); // Impact parameter for alpha particle, m
+f = %pi*b^2*n*t; // Fraction of alpha-particles scattered at angles greater than 90 degrees
+printf("\nFraction of alpha-particles scattered at angles greater than 90 degrees = %3.1e", f);
+
+// Result
+// Fraction of alpha-particles scattered at angles greater than 90 degrees = 7.5e-05
+
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