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Why does an electron in the K-shell have a higher probability of being knocked free during X-ray than electrons in other shells?

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  • $\begingroup$ Electron density is the most for K-shell. $\endgroup$ – Mitchell Oct 2 '17 at 7:14
  • $\begingroup$ But why does electron density determine the probability? Is there a formula to determine this? $\endgroup$ – Andreas Urskov Oct 2 '17 at 7:35
  • $\begingroup$ I don't know about any formula but it makes sense intuitively. You have more chances to find an electron in smaller volume than larger one. $\endgroup$ – Mitchell Oct 2 '17 at 7:36
  • $\begingroup$ what do you mean by "knocked free"? $\endgroup$ – MattiaBenini Oct 2 '17 at 7:37
  • $\begingroup$ When the energi from a photon is transferred to an electron and the amount of energi is enough to completely knock free the electron from the atom. $\endgroup$ – Andreas Urskov Oct 2 '17 at 8:14

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