1971
DOI: 10.1097/00004032-197103000-00005
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Attenuation of 4-32 MeV X-rays in Ordinary Concrete, Heavy Concrete, Iron and Lead

Abstract: The broad-beam attenuation coefficients for lead, iron, heavy concrete and ordinary concrete were evaluated using the X-ray beams from a 32 MeV betatron, a 3 1 iMeV betatron and a 6 lMeV linear accelerator for the purpose of the design of the protective shielding to be placed around high enexgy accelerators. Attenuations in these materials were determined by measuring the ionization in a cavity in a water phantom behind various thicknesses of materials.The variation in tenth-value thickness with field size for… Show more

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Cited by 12 publications
(4 citation statements)
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“…Nelson and LaRiviere (1984) calculated 78 g cm -2 and 64 g cm -2 for the first and second ρTVL respectively at 6 MV. Maruyama, et al (1971), Lokan, et al (1972) and Barish (1993) have published the results of measurements of primary photon transmission through various high-density concretes. Those results are not directly comparable with the measurements of leakage radiation reported here.…”
Section: Photonsmentioning
confidence: 99%
See 1 more Smart Citation
“…Nelson and LaRiviere (1984) calculated 78 g cm -2 and 64 g cm -2 for the first and second ρTVL respectively at 6 MV. Maruyama, et al (1971), Lokan, et al (1972) and Barish (1993) have published the results of measurements of primary photon transmission through various high-density concretes. Those results are not directly comparable with the measurements of leakage radiation reported here.…”
Section: Photonsmentioning
confidence: 99%
“…However, these data are normally for ordinary concrete and given for primary photons and neutrons, not for leakage photons and neutrons. Maruyama, et al (1971), Lokan, et al (1972) and Barish (1993) have published primary photon transmission data for specific high-density concretes.…”
Section: Introductionmentioning
confidence: 99%
“…Este procedimiento de cálculo se conoce como 'cálculo directo' o analítico, y consiste en usar ecuaciones determinadas en radio-protección para obtener los espesores necesarios de las barreras de la instalación con el propósito de atenuar la radiación hasta un valor inferior a un objetivo de dosis límite propuesto. Los valores de TVL usados en estos cálculos se basan simulaciones de Montecarlo con una barrera y aproximaciones conservativas de TVL primarios, secundarios y de fuga obtenidos en investigaciones previas [46,5].…”
Section: Metodología De Cálculo De Blindajesunclassified
“…De acuerdo a lo obtenido en los experimentos del Mn54 en Geant4 se concluye que esta es una herramienta confiable para simular la atenuación de radiación ionizante. Los resultados de la simulación de pared de concreto indican en ocasiones sub-estimación cuando se usan los valores de densidad y TVL mínimos reportados en la literatura [5] y sobrestimación cuando se usan los valores de densidad y TVL máximos reportados en la literatura [2]. Los resultados de la simulación del búnker indican limitaciones en la capacidad de predicción de los cálculos propuestos por el NCRP para un haz de tamaño de 10 cm x 10 cm y una sobre-estimación del grosor de barrera para los objetivos de diseño.…”
Section: Introductionunclassified