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KMID : 1151820150090060375
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Journal of the Korean Society of Radiology
2015 Volume.9 No. 6 p.375 ~ p.379
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Determination of the Effective Energy of X-Ray Beam Using Optically Stimulated Luminescent nanoDot Dosimeters
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Kim Jong-Eon
Lee Sang-Hun
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Abstract
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The purpose of this study is to determine the effective energy of a polyenegetic X-ray beam. The half value layer(HVL) of aluminum for 80 kVp X-ray beam was measured by using optically stimulated luminescent nanoDot dosimeters(OSLnDs). The linear attenuation coefficient(μ) was calculated using the measured HVL. And the mass attenuation coefficient(μ/ρ) was obtained by dividing the linear attenuation coefficient by the density(ρ) of aluminum. The effective energy(Eeff) of the obtained mass attenuation coefficient was determined using data of the X-ray mass attenuation coefficients for photon energies of aluminum given by National Institute of Standards and Technology(NIST). As a result, the HVL value is 2.262 ㎜Al. The μ value is 3.06 ㎝-1. The μ/ρ value is 1.114 ㎠/g. And the Eeff value was determined at 29.79 keV.
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KEYWORD
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Optically stimulated luminescent nanoDot dosimeter, Half value layer, Linear attenuation coefficient, Mass attenuation coefficient, Effective energy
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