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Klein–Nishina electronic cross-section, Compton cross sections, and buildup factor of wax for radiation shielding and protection.

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Title: Klein–Nishina electronic cross-section, Compton cross sections, and buildup factor of wax for radiation shielding and protection.
Authors: Manar Alenezi1, Kayla Stinson1, Muhammad Maqbool2 mmaqbool@uab.edu, Norman Bolus2
Source: Journal of Radiological Protection. Mar2018, Vol. 38 Issue 1, p1-1. 1p.
Subjects: Photons, Gauge bosons, Backscattering, Scattering (Physics), Radiation shielding
Abstract: Klein–Nishina scattering cross-sections, Compton scattering, mass attenuation and energy transfer cross-sections, linear attenuation coefficient and buildup factor of 99.99% pure paraffin wax (Carbon = 85.14%, Hydrogen = 14.86%). are calculated using 0.662, 0.835, 1.17 and 1.33 MeV γ-rays. The mentioned γ-rays were obtained from Cs-137, Mn-54 and Co-60 radioisotopes. Gamma rays obtained from these radioisotopes were passed through circular shaped wax slices and allowed to fall on a NaI detector. The thickness of wax slices were 0.33–2.9 cm with 6 cm diameter. Lead collimator of 1 cm diameter hole in the middle was used to obtain a collimated beam for narrow beam geometry. Broad beam geometry was used by removing the collimator to investigate buildup factor. Results show that Klein–Nishina electronic cross-section, Compton mass attenuation coefficient and Compton energy transfer coefficient all decrease with increasing photon energy. Linear attenuation coefficients μ = 0.0532 cm−1 for 1.17 MeV beam and μ = 0.0419 cm−1 for 1.33 MeV γ-rays were obtained for wax. Variations in buildup factors are observed with increasing thickness of wax for 1.17 and 1.33 MeV beams. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Klein–Nishina scattering cross-sections, Compton scattering, mass attenuation and energy transfer cross-sections, linear attenuation coefficient and buildup factor of 99.99% pure paraffin wax (Carbon = 85.14%, Hydrogen = 14.86%). are calculated using 0.662, 0.835, 1.17 and 1.33 MeV γ-rays. The mentioned γ-rays were obtained from Cs-137, Mn-54 and Co-60 radioisotopes. Gamma rays obtained from these radioisotopes were passed through circular shaped wax slices and allowed to fall on a NaI detector. The thickness of wax slices were 0.33–2.9 cm with 6 cm diameter. Lead collimator of 1 cm diameter hole in the middle was used to obtain a collimated beam for narrow beam geometry. Broad beam geometry was used by removing the collimator to investigate buildup factor. Results show that Klein–Nishina electronic cross-section, Compton mass attenuation coefficient and Compton energy transfer coefficient all decrease with increasing photon energy. Linear attenuation coefficients μ = 0.0532 cm−1 for 1.17 MeV beam and μ = 0.0419 cm−1 for 1.33 MeV γ-rays were obtained for wax. Variations in buildup factors are observed with increasing thickness of wax for 1.17 and 1.33 MeV beams. [ABSTRACT FROM AUTHOR]
ISSN:09524746
DOI:10.1088/1361-6498/aaa57b