How Do You Find K Beta X-Ray Energy?

[FVZZBO]

I know you can use Moseley's law to calculate K Alpha X-ray energy. Can this law be used to calculate the K Beta energy?

$$
\Delta E = (-13.6eV)(Z-1)^2\left(\frac{1}{n_{1}^2}-\frac{1}{n_{2}^2}\right)
$$

I saw on http://minerva.union.edu/labrakes/PIXE_Physics100_Lecture3_F14.pdf that they use it to calculate the K Beta wavelength for copper, but this doesn't make sense to me. How could it still be Z-1? Isn't there more screening/shielding because the electron is coming from the M shell?

 

[LightHero]

No, Moseley's law cannot be used to calculate the K Beta energy. It is not valid for transitions from inner shells. For inner shell transitions, a more complex formula must be used that takes into account the effects of electron shielding and other factors.