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//Example 30.2
Z=74-1;//Effective charge for tungsten
E_0=13.6;//Ground-state energy (eV)
n1=1;//n=1 shell
E_1=-Z^2/n1^2*E_0;//Energy level for n=1 shell (eV)
n2=2;//n=2 shell
E_2=-Z^2/n2^2*E_0;//Energy level for n=2 shell (eV)
E_K_alpha=E_2-E_1;//K_alpha x-ray energy (eV)
printf('Approximate energy of the K_alpha x-ray = %0.1f keV',E_K_alpha/1000)
//Openstax - College Physics
//Download for free at http://cnx.org/content/col11406/latest
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