A method for determination mass absorption coefficient of gamma rays by Compton scattering |
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| Affiliation: | 1. The Key Laboratory of Beam Technology and Materials Modification of the Ministry of Education, Beijing Normal University, Beijing 100875, China;2. College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;3. Beijing Radiation Center, Beijing 100875, China;4. Center for Disease Control and Prevention of Beijing, Beijing 100013, China;1. Department of Nuclear Medicine and Centre for PET, Austin Health, Heidelberg, VIC, Australia;2. The University of Melbourne, Parkville, VIC, Australia;3. Ludwig Institute for Cancer Research, Melbourne Branch, VIC, Australia;4. Ecole National Supérior de Chimie de Rennes, Rennes, France;1. Department of Physics and Astronomy, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA;2. Triangle Universities Nuclear Laboratory, Durham, NC 27708, USA;3. Keene State College, Keene, NH 03435, USA |
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| Abstract: | A method was proposed for determination mass absorption coefficient of gamma rays for compounds, alloys and mixtures. It is based on simulating interaction processes of gamma rays with target elements having atomic numbers from Z=1 to Z=92 using the MCSHAPE software. Intensities of Compton scattered gamma rays at saturation thicknesses and at a scattering angle of 90° were calculated for incident gamma rays of different energies. The obtained results showed that the intensity of Compton scattered gamma rays at saturations and mass absorption coefficients can be described by mathematical formulas. These were used to determine mass absorption coefficients for compound, alloys and mixtures with the knowledge of their Compton scattered intensities. The method was tested by calculating mass absorption coefficients for some compounds, alloys and mixtures. There is a good agreement between obtained results and calculated ones using WinXom software. The advantages and limitations of the method were discussed. |
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| Keywords: | Mass absorption coefficient Compton scattering Saturation thickness Intensity MCSHAPE software |
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