'Attenuation coefficients' diaporamas de présentation

Projection Radiography Chapter 5

Projection Radiography Chapter 5. Dr. Mohamed Bingabr University of Central Oklahoma. Biomedical Engineering. Outline. Introduction Instrumentation Image formation Noise and Scattering. Conventional Projection Radiography.

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Outline

Evaluation of hydroacoustics for monitoring suspended-sediment transport in rivers Scott Wright (CA WSC) and David Topping (GCMRC) Special acknowledgement to Cory Williams (CO WSC) and Molly Wood (ID WSC) for data and assistance OSW Webinars, 29-Sep-09, 2-Oct-09. Outline.

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Preliminary results from spectral characterization of aerosol absorption during FLAME

Preliminary results from spectral characterization of aerosol absorption during FLAME. Gavin McMeeking Sonia Kreidenweis Jeffrey Collett, Jr. Lynn Rinehart Guenter Engling Rich Cullin Kip Carrico. Colorado State University. University of Nevada/DRI. Pat Arnott Kristin Lewis.

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PROFILE A 2002-2003

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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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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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