Shielding & Attenuation
Every shielding & attenuation calculator on CalcEngines — each with its formula, a worked example, the standard it follows and the assumptions it makes.
4 calculators in this section
- Half Value Layer and Transmission CalculatorThe half-value layer, the tenth-value layer and the transmission through any thickness, from NIST photon attenuation data for eight materials — with the published broad-beam figure printed beside the calculated one, because build-up makes them different numbers.
- Layered Shield Attenuation CalculatorThree materials in series: the total transmission, which layer is doing the work as a share of the attenuation, and the single slab that would do the same job — with the order of the layers making no difference, which is checked rather than asserted.
- Mass Attenuation Coefficient CalculatorNIST photon attenuation data as a reference: μ/ρ and μen/ρ for eight materials from 1 keV to 20 MeV, with the linear coefficients, the mean free path, every absorption edge and a derived split of the three interaction processes.
- Shield Thickness for a Target Dose Rate CalculatorThe thickness that takes a dose rate down to the figure you name — in millimetres, in half-value layers, in lead codes and in concrete courses, with the published broad-beam thickness printed beside the narrow-beam one because the narrow-beam one is always smaller.