Compton effect

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Describing Compton Effect from Quantum Mechanics. Presented in East West University.

1. COMPTON EFFECT

2. Presented by Md. Jayedul Islam ID: 2015-2-65-017 Md. Imran Ahmed ID: 2015-2-50-018 Al-Amin Islam Hridoy ID: 2016-1-60-023 Moname Majumder ID: 2016-1-60-065

3. Overview Introduction Compton Effect Compton Scattering Applications of Compton Effect Conclusion

4. INTRODUCTION In 1923 American physicist Arthur Holly Compton performed an experiment by which he discovered an effect of photon over electron which is known as Compton Effect. He later won the noble prize in Physics in 1927 for his discovery of this Compton E ffect .

5. INTRODUCTION directed a beam of x-rays of wavelength  onto a carbon target x-rays are scattered in different directions . COMPTON EFFECT

6. COMPTON effect e     Photon Scattered Photon Scattered Electron

7. COMPTON effect e     E = h   E = m c 2 E = h   E =   p =   p =   p = p p = 0

8. Compton Scattering If we consider the photon idea of light, some of the photons would “hit” the charged particles and “ bounce off ”. The laws of conservation of energy and momentum should then predict the scattering .

9. Compton Scattering P hotons have momentum as well as energy . The scattered photons will have less energy and less momentum after collision with electrons, and so should have a larger wavelength according to the formula:   =  scattered -  incident = [1-cos  ]  

10. Compton Scattering  =  scattered -  incident = [1-cos  ] Note that Planck’s constant is in this relation as well, and gives a further experimental way of getting this value . Again, the photon theory provides a nice explanation of a phenomenon involving light.  

11. Compton Scattering  =  scattered -  incident = [1-cos  ] Note that the maximum change in wavelength is (for scattering from an electron) = = 4.86 x 10 -12 m =  which would be insignificant for visible light (with l of 10 -7 m) but NOT for x-ray and  -ray light (with l of 10 -10 m or smaller) .  

12. APPLICATION OF COMPTON EFFECT 1. Compton scattering is of prime importance to Radiobiology , as it is the most probable interaction of gamma ray and high energy x-ray with atoms in living beings and is applied in R adiation T herapy .

13. APPLICATIONs OF COMPTON EFFECT 2 . In material physics , Compton Effect can be used to probe the wave function of the electrons in the momentum representation.

14. APPLICATIONs OF COMPTON EFFECT 3. Compton scattering is an effect gamma spectroscopy which gives rise to the Compton edge . As it is possible for the gamma rays to scatter out of the detectors used. C ompton suppression is used to detect stray scatter gamma rays to counteract this effect. Compton edge – Compton edge is a feature of spectrograph that result from the C ompton scattering in the detector .

15. CONCLUSION Compton effect is a very important discovery for Quantum Mechanics . It added a new dimension to Quantum Physics . Many tasks which were impossible once are possible for the discovery of this effect. Except these Radiation Therapy , Wave Function and gamma spectroscopy , there are many more uses of this Compton Effect . And many more secrets can be uncovered by the help of this effect. So, we should learn more deeply about this Compton Effect.

16. References https:// en.wikipedia.org/wiki/Compton_scattering https:// www.britannica.com/science/Compton-effect http:// electrons.wikidot.com/compton-effect http:// scienceworld.wolfram.com/physics/ComptonEffect.html

17. THE END