An Approximation of Gamma-Ray Buildup Factors by Modified Geometrical Progression

Harima, Yoshiko

doi:10.13182/nse83-a18222

Cited by 195 publications

(52 citation statements)

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“…The interpolation of Z eq is employed by the formula (Harima, 1983;Maron, 2007): (1) where Z 1 and Z 2 are the atomic numbers of the elements corresponding to the ratios R 1 and R 2 , respectively. R is the ratio (µ/ρ) Compton / (µ/ρ) Total at specific energy and the ratio (µ/ρ) Compton / (µ/ρ) Total for Z eq lies between two successive ratios of the elements.…”

Section: Computation Methodsmentioning

confidence: 99%

Gamma-ray exposure build-up factors of some brick materials in the state of Punjab

Singh

Badiger

2013

Radioprotection

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Section: Computation Methodsmentioning

confidence: 99%

Gamma-ray exposure build-up factors of some brick materials in the state of Punjab

Singh

Badiger

2013

Radioprotection

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“…Calculation of the Geometric-Progression (G-P) fitting parameters using interpolation method. [11,12] 3. Calculation of the exposure buildup factors.…”

Section: Methods Of Computationmentioning

confidence: 99%

Exposure buildup factors for heavy metal oxide glass: A radiation shield

Manohara¹,

Hanagodimath²,

Gerward³

et al. 2011

J. Korean Phy. Soc.

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Gamma ray exposure buildup factors for three Heavy Metal Oxide (HMO) glass systems, viz. PbO-Bi2O3-B2O3, PbO-B2O3, and Bi2O3-B2O3 glasses are presented. The computations were done by interpolation method using the Geometric Progression fitting formula and ANSI/ANS-6.4.3 library for the energy range from 0.015 to 15 MeV, up to penetration depths of 40 mfp (mean free path). The buildup factors have been studied as functions of incident photon energy and penetration depth. The variations in the buildup factor, for all the glass systems, in different energy regions, have been presented in the form of graphs. Buildup factors of these HMO glasses cannot be found in any standard database, but they are useful for practical calculations in gamma ray shield designs, and they also help to determine and control the thickness of the shielding material used.

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“…The interpolation of Z eq is employed by the formula (Harima, 1983;Maron, 1987): (1) where Z 1 and Z 2 are the atomic numbers of the element corresponding to the ratios R 1 and R 2 , respectively. R is the ratio (µ/ρ) Compton / (µ/ρ) Total at specific energy and the ratio (µ/ρ) Compton / (µ/ρ) Total for the Z eq lies between two successive ratios of the elements such that R 1 < R < R 2 .…”

Section: Computational Workmentioning

confidence: 99%

Photon energy absorption buildup factors of gaseous mixtures used in radiation detectors

Singh

Badiger

2012

Radioprotection

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Gamma-ray energy absorption buildup factors of gaseous mixtures; neon (95%) + argon (5%), argon (95%) + acetylene (5%) , argon (95%) + methane (5%), argon (95%) + carbon dioxide (5%), methane (70%) + pentane (30%) and argon (90%) + methane (10%) were studied by Geometrical Progression (G-P) fitting for the photon energy range 0.015-15 MeV. It was found that the equivalent atomic number, Z eq of the gaseous mixtures sharply reduces after 1 MeV photon energy. The Z eq for the mixture of methane (70%) + pentane (30%) is the minimum, whereas the maximum is for argon (95%) + carbon dioxide (5%) for the photon energies under investigation. The Energy Absorption Buildup Factor (EABF) for methane (70%) + pentane (30%) was found to be the highest among all the selected gaseous mixtures. The chemical composition of the gaseous mixtures has an impact on the EABF values for photon energy and penetration depth. The investigation of the EABF is useful for selection of gaseous mixtures in design consideration of gaseous radiation detectors for gamma radiation.

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An Approximation of Gamma-Ray Buildup Factors by Modified Geometrical Progression

Cited by 195 publications

References 0 publications

Gamma-ray exposure build-up factors of some brick materials in the state of Punjab

Gamma-ray exposure build-up factors of some brick materials in the state of Punjab

Exposure buildup factors for heavy metal oxide glass: A radiation shield

Photon energy absorption buildup factors of gaseous mixtures used in radiation detectors

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