- PAIR PRODUCTION
- PHOTO DISINTEGRATION
1. COHERENT SCATTERING
Scattering – in this x ray interact with matter
Elastic collision – in elastic collision total kinetic energy of the body remains same
Photon energy = < 10 kev.
X ray photon passing close to the atom cause electron to vibrate at equal frequency to the incident radiation. •
Wavelength remaining same as of incident photon to that of emitted photon.
•Single electron involved •No ionization
•All the electrons of an atom. •It is the phenomenon of scattering of photon particle by the molecule of gas, multiple interaction of incidence radiation to electron of atom.
Inelastic collision • High energy photon (100kev or more) •Incident photon loose energy and its gain by the scatter radiation •Amount of energy gain by electron and loose by incident photon are depend upon angle of scatter and energy of incident photon •Larger angle of scatter of photon, more energy loose to electron. (max 180°) back scatter. •E0 = E2 + E3.
3. PHOTOELECTRIC EFFECT
•Below 100 kev •It is the emission of electrons or other free carrier when electromagnetic Radiation like visible light, x rays, y rays hits a material, electrons emits electrons. •Photon transfer all its energy to one of orbital electron of the atom. •Absorption of electron by atom leads to ionization by emission of electron •Electron acquire kinetic energy of amount equal to that of photon energy •Electron released in this called photoelectron.
TO BE CONTINUE…..