X-ray Attenuation Prototype (Energy-Dependent HVL) Source Machine: Circular Model A Distribution Energy: 7.5 MeV 7.0 MeV 6.5 MeV 6.0 MeV 5.5 MeV 4.5 MeV 4.0 MeV 3.5 MeV 3.0 MeV 2.5 MeV 2.0 MeV Strength (mR @ 1 m): Thresholds 100 mR: 2 mR: Materials by HVL Material: Lead Concrete Water Tungsten Shields 🔲 Draw Shield Click-drag on canvas to draw shield Actions Compute Map Reset Info Move cursor over map to see distances. Edit Selected Shield Material: Lead Concrete Water Tungsten X (cm): Y (cm): W (cm): H (cm): 💾 Update Shield 🗑 Delete Shield