Compute transmitted intensity from initial intensity, linear attenuation coefficient and material thickness. Used in shielding design, NDT and protection thickness selection.
输入初始强度 I₀、衰减系数 μ、厚度 x,求透射强度。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Attenuation law | I = I₀e^(−μx) | Beer-Lambert law |
| Half-value layer | HVL = ln 2 / μ | Shielding fundamentals |
| Mass attenuation | μ/ρ in cm²/g | NIST XCOM |
| Buildup factor | Buildup factor accounts for scatter | ANS-6.4.3 |
| Tenth-value layer | TVL = ln 10 / μ | Radiation protection |
| Material dependence | Pb > Fe > concrete per thickness | Shielding handbook |