X-rays: Transitions involving inner-shell electrons

Inner- Shell Transitions and Characteristic X-Rays:

            Hydrogen atom has only one shell in ground state. Its energy levels are of the order of few electron volts (ev) ; En = – 13.6 ev/n2. Therefore its spectrum has only lines in ultraviolet, visible and infrared region. But other heavy atoms have K, L, M, N….  shells. So their spectrum also has lines in x-ray region.

            Suppose a heavy target material is bombarded with a beam of electrons that has been accelerated by applying high potential difference across the electrodes (several kev). Some of these electrons collide with inner-shell electrons of target material and knock them out of their respective atom.    

         Further suppose that a K-shell electron is knocked out from an atom creating a vacancy in K-shell. Then an electron from either L, M or N shell will quickly jump down to fill the vacancy in the K-shell emitting energy as x-ray photon. An x-ray photon due to transition from L-shell to vacancy in the K-shell is called Kα characteristic x-ray. The transition from M and N-shells to the K-shell give rise to Kβ and Kγ characteristic x-ray respectively. Similarly L, M and N series characteristic x-rays, relatively of low energy, are produced due to the ejection of electrons from L, M and N-shells respectively.

Rating: 1 out of 5.

1 thought on “X-rays: Transitions involving inner-shell electrons”

  1. Together with every thing that appears to be developing throughout this subject matter, your opinions tend to be very stimulating. On the other hand, I appologize, because I can not subscribe to your entire strategy, all be it exciting none the less. It seems to everyone that your opinions are generally not totally justified and in reality you are generally yourself not really fully certain of the point. In any event I did take pleasure in looking at it.

Leave a Reply

%d bloggers like this: