Sunday, December 29, 2013

X-ray Interaction with matter

-Attenuation; a reduction in the intensity of a reflect of x-radiation as it passes through a medium out-of-pocket to density or to dissipateor to both. -Absorption; the transfer of energy from the roentgenogram perspective to the medium through which it passes. -Scattering; a change over in the attention of a photon due to fundamental interaction with the medium, this can go wrong with or without the loss of energy from the photon. -4 types of roentgen ray interaction withn payoff occur; rayleigh circularize, Compton scatter, photoelectric absorptoion and pair production. The first 3 guide a role in diagnostic radiography. Rayleigh disperse; occurs when the roentgenogram photon interacts with the full-length atom so that the photon is scattered with no change in internal energy to the scattering atom, nor to the x-ray photon. Rayleigh scattering is neer much than a minor contributor to the absorption coefficient. The scattering occurs without the loss of energy . Scattering is mainly in the earlier direction. Compton scatter; If an x-ray photon has an energy genuinely(prenominal) much greater than the ionization energy of the electron with which it interacts, Compton scattering takes place. Incident x-ray is very high it only interacts with outer shell electrons. Incident photon loses energy, fortuity photo ionizes the atom because of this loses energy passes onto Compton electron thus losing more than energy.
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Probability of the process occurring is independent of atomic number. Process is probable to occur in bone and muscle. Probability of a Compton interactio n decreases as incident photon energy increa! se. Photoelectric absorption; occurs when the x-ray photon is draped resulting in the ejection of electrons from the outer shell of the atom, resulting in the ionization of the atom. the ionized atom returns to the neutral state with the sack of an x-ray characteristic of the atom. This subsequent emission of lower energy... If you essential to exact a full essay, order it on our website: OrderCustomPaper.com

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