'Attenuation coefficient' diaporamas de présentation

Interaction of Gamma-Rays - General Considerations

Interaction of Gamma-Rays - General Considerations. uncharged transfer of energy creation of fast electrons. Interaction of Gamma-Rays - Types. photoelectric Compton pair production photodisintegration. Photoelectric Effect.

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Lecture 5 Overview on the Analytical Procedures ( g )

IAEA Regional Training Course Sediment Core Dating Techniques - RAF/7/008 Project CNESTEN, Rabat, 05-09 July 2010. IAEA. CNESTEN. Lecture 5 Overview on the Analytical Procedures ( g ). Moncef Benmansour CNESTEN, Rabat Morocco. Contents. Radionuclides and radiations

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Objectives: To understand; 1. Derivation of the attenuation law 2. Half value layer

Objectives: To understand; 1. Derivation of the attenuation law 2. Half value layer Contributions to the attenuation coefficient and their energy dependence 4. Beam hardening calculations 5 . K-edge filters

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Resident Physics Lectures

Resident Physics Lectures. Christensen, Chapter 5 Attenuation. George David Associate Professor Medical College of Georgia Department of Radiology. Beam Characteristics. Quantity number of photons in beam. 1, 2, 3,. ~. ~. ~. ~. ~. ~. ~. ~. ~. ~. ~. ~. Beam Characteristics.

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Interaction Ionizing Radiation with Matter

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Radiation Interaction - Detection

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UNIT-IV

UNIT-IV . X-RAYS. X-RAYS. X-rays are electromagnetic waves Their interaction with matter is governed by quantum theory. The energy of x-ray photons is E = hv . Wavelengths of x-rays is 0.001 to 10 nm. Discovery of X-Rays. Wilhelm Roentgen (1895). image from Wolfram Research.

1.36k views • 32 slides

Radiation Interactions

Radiation Interactions. Robert Metzger, Ph.D. Interactions with Matter. Charged particles lose energy as they interact with the orbital electrons in matter by excitation and ionization, and/or radiative losses.

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Dosimetry part 1: X-ray interactions with matter

Dosimetry part 1: X-ray interactions with matter. G.Haddadi, PhD, MSc Associated prof. of Medical Physics Fassa University of Medical Sciences. Basic concepts of risk versus benefit. Radiation protection can only be practiced well when understood the risks and benefits of radiation

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Resident Physics Lectures

Resident Physics Lectures. 03: Attenuation. Attenuation. Reduction in amplitude & intensity as sound travels through medium Causes absorption sound energy converted to heat dominant influence in soft tissue reflection scattering. Absorption. Units decibels (dB)

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Principles of Spectrometry

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X-Ray Physics

X-Ray Physics. Assumptions: Matter is composed of discrete particles (i.e. electrons, nucleus) Distance between particles >> particle size X-ray photons are small particles Interact with body in binomial process Pass through body with probability p

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Experimental study of beam hardening artefacts in photon counting breast computed tomography

Experimental study of beam hardening artefacts in photon counting breast computed tomography. M.G. Bisogni a , A. Del Guerra a ,N. Lanconelli b , A. Lauria c , G. Mettivier c , M.C. Montesi c , D. Panetta a , R. Pani d , M.G. Quattrocchi a , P. Randaccio e , V. Rosso a , P. Russo c

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Experimental study of beam hardening artefacts in photon counting breast computed tomography

Experimental study of beam hardening artefacts in photon counting breast computed tomography. M.G. Bisogni a , A. Del Guerra a ,N. Lanconelli b , A. Lauria c , G. Mettivier c , M.C. Montesi c , D. Panetta a , R. Pani d , M.G. Quattrocchi a , P. Randaccio e , V. Rosso a , P. Russo c

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Alberto Ribon CERN

Tutorial of the Statistical Toolkit. Geant4 Workshop Vancouver, September 2003. Alberto Ribon CERN. http://www.ge.infn.it/geant4/analysis/TandA. Download/setup the Statistical Toolkit. http://www.ge.infn.it/geant4/analysis/HEPstatistics

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In The Name Of God

In The Name Of God. CHAPTER 2. Attenuation in tissues. Absorption coefficient Attenuation coefficient Neper Scattering coefficient. Key terms. ATTENUATION.

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Effect of weight fraction of different constituent elements on the total attenuation coefficients of some biologically i

The total attenuation coefficients, µ/ρ, of some biologically important vitamins containing H, C, N and O have been studied as a function of weight fraction of constituent elements. A considerable change in µ/ρ is seen only in low energy region whereas no change is observed with the increasing percentage of constituent elements (hydrogen, carbon, oxygen and nitrogen) in high energy region up to 1500 keV.

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To study the linear and mass attenuation coefficient of alcohol soluble compound for gamma rays at energy 662 KeV

Linear and mass attenuation of 662 KeV gamma radiations from alcohol ethanol by dilute solution of para-nitro aniline (C6H6O2N2) studied for different concentrations. Mixture rule for theoretical calculation of attenuation coefficient is developed for the solution; our study explores the validity of the expected exponential absorption law for gamma radiation in solution and also provides an alternative method for direct determination of linear and mass attenuation coefficients of soluble compound in alcohol.

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Measurement of mass and linear attenuation coefficients of gammarays of Al for 514, 662 and 1280 keV photons

Measurements have been made to determine gamma ray attenuation coefficients very accurately by using a narrow-collimated-beam method which effectively excluded corrections due to smallangle and multiple scattering of photons. Mass (µ/ρ) and linear attenuation coefficients (µ) of Al for 514, 662 and 1280 keV gamma-rays photons have been measured using the well-type scintillation spectrometer. The values of µ and µ/ρ thus obtained are found to be in good agreement with the theory.

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