Photoelectric Effect I interaction of X- Ray photon with matter l Radiography Simplified l скачать в хорошем качестве

Photoelectric Effect I interaction of X- Ray photon with matter l Radiography Simplified l

Hi friends how are you? Old video Links links    • Видео      • Radiographic cassette / x- ray cassette l ...      • Types of Radiographic /x ray cassette l Ra...      • Wilhelm Conrad Roentgen l एक्स-रे की खोज l...      • Видео      • Practical demonstration of computed Radiog...      • Practical demonstration of computed Radiog...   I am posting video on "interaction of x rays with matter & Photoelectric Effect. Fate of x ray Photon:- 1. It can penetrate the section of matter without interacting. 2. It can interact with the matter and be completely absorbed. 3. It can interact and be scattered or deflected from its original direction. Five ways x ray interact with matters 1) coherent scattering. 2) photoelectric effect. 3) compton scattering. 4) paired production. 5) photo disintegration. In the photoelectric interaction, , a photon transfers all its energy to an electron located in one of the atomic shells. The electron is ejected from the atom by this energy and begins to pass through the surrounding matter. The photon's energy is divided into two parts by the interaction. A portion of the energy is used to overcome the electron's binding energy. The remaining energy is transferred to the electron as kinetic energy and is deposited near the interaction site. it creates a vacancy in one of the electron shells, typically the K or L, an electron moves down to fill in. The drop in energy of the filling electron often produces a characteristic x-ray photon which is equal to the difference of binding energy of two shell Probability of photoelectric effect:- 1) the energy of the incident photon is equal to or just greater than the binding energy of the electron in its shell. 2) the electron is tightly bound (high atomic number) Advantage 1) no scattered radiation. 2) enhance tissue contrast. 3) good Radiographic details. Disadvantages:- 1) increased patient exposure dose.