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//variable initialization
lembda_c=0.024 //Compton wavelength of electron (Å)
lembda=1 //Wavelength of X-rays (Å)
Theta1=(60*%pi)/180; //angle (radian)
Theta2=(90*%pi)/180; //angle (radian)
Theta3=(180*%pi)/180; //angle (radian)
ch=12400 //constant (eV Å)
//(a) Compton shift
shift1=lembda_c*(1-cos(Theta1)); //Compton shift (Å)
shift2=lembda_c*(1-cos(Theta2)); //Compton shift (Å)
shift3=lembda_c*(1-cos(Theta3)); //Compton shift (Å)
//(b) Kinetic energy imparted to the recoil electron
T1=(ch*shift1)/(lembda*(lembda+shift1)); //Kinetic energy imparted to the electron (eV)
T2=(ch*shift2)/(lembda*(lembda+shift2)); //Kinetic energy imparted to the electron (eV)
T3=(ch*shift3)/(lembda*(lembda+shift3)); //Kinetic energy imparted to the electron (eV)
printf("\n(a) Compton shift:\n\t (i) %.3f Å\n\t (ii) %.3f Å\n\t (iii) %.3f Å\n(b) Kinetic energy imparted to the recoil electron:\n\t (i) %.0f eV\n\t (ii) %.0f eV\n\t (iii) %.0f eV",shift1,shift2,shift3,T1,T2,T3);
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