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// Chapter 4 Additional Example 3
//==============================================================================
clc;
clear;
// input data
Ei = 1.02*10^6 // photon energy in eV
theta = 90; // scattered angle in degrees
h = 6.625*10^-34 // plancks constant
mo = 9.1*10^-31 // mass of electron in Kg
e = 1.6*10^-19 // charge of electron
c = 3*10^8; // vel. of light in m/s
// Calculatioms
// from Compton theory ,Compton shift is given by
// lamda' - lamda = (h/(mo*c))*(1-cosθ)
theta_r = theta*%pi/180; // degree to radian conversion
c_lamda = ( (h/(mo*c))*(1-cos(theta_r))) // Change in wavelength in m
dv = c/c_lamda; // change in frequency of the scattered photon
dE = (h*dv)/e // change in energy of scattered photon in eV
// This change in energy is transferred as the KE of the recoil electron
Er = dE; // Energy of recoil electron
Es = Ei - Er // Energy of scattered photon
// Output
mprintf('Energy of the recoil electron = %3.4f MeV\n Energy of the Scattered photon = %3.4f MeV',Er*10^-6,Es*10^-6);
//==============================================================================
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