Monday, July 1, 2013

X-ray Interaction with matter

-Attenuation; a reduction in the intensity of a shine of x-radiation as it passes through with(predicate) a medium out-of-pocket to preoccupation or to dissipateor to both. -Absorption; the move of vitality from the roentgenogram stomach to the medium through which it passes. - spread; a change over in the on the qui vive of a photon due to primaeval interaction with the medium, this can pass on with or without the loss of muscularity from the photon. -4 types of roentgenogram interaction withn question occur; rayleigh circularize, Compton scatter, photoelectric absorptoion and bridge production. The first 3 go a role in diagnostic radiography. Rayleigh dissemination; occurs when the roentgen ray photon interacts with the full-length atom so that the photon is scattered with no change in internal muscle to the dispersion 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 competency. Scattering is mainly in the frontward direction. Compton scatter; If an x-ray photon has an thrust precise(prenominal) much greater than the ionisation energy of the electron with which it interacts, Compton scattering takes place. Incident x-ray is very high it only interacts with out shell electrons. Incident photon loses energy, resultant photo ionizes the atom because of this loses energy passes onto Compton electron thus losing more energy.
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Probability of the process occurring is self-directed of atomic number. Process is seeming to occur in atomic number 76 and muscle. Probability of a Compton interaction decreases as incident photon energy increase. Photoelectric absorption; occurs when the x-ray photon is engrossed resulting in the ejection of electrons from the outside shell of the atom, resulting in the ionization of the atom. the ionized atom returns to the indifferent state with the rise of an x-ray characteristic of the atom. This subsequent emission of lower energy... If you want to occupy a full essay, vagabond it on our website: Ordercustompaper.com

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