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College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

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BuyFindarrow_forward

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

The maximum characteristic x-ray photon energy comes from the capture of a free electron into a K shell vacancy. What is this photon energy in keV for tungsten, assuming the free electron has no initial kinetic energy?

To determine

The photon energy for tungsten.

Explanation

Given info:

The K shell transition is taking place.

Formula used:

Change in energy when electron jumps from one energy level to another energy level is calculated as

  ΔE=EiEf

Where ΔE= Change in energy

  Ei= Initial Energy

  Ef= Final Energy

Also, equation to find the energy of electron for hydrogen like atom is given as

  E=Z2n2Eo

Calculation:

Here, electron is transitioned from infinity to the ground state.

Thus, ni= and nf=1

Also, the atomic number of tungsten is Z=73.

Thus, change in energy is calculated as

  ΔE=Z2ni2EoZ2nf

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