HVL / TVL

For narrow-beam monoenergetic approximations, attenuation is often expressed in half-value layers (HVL). TVL (tenth-value layer) relates to HVL by TVL ≈ HVL × log₂(10) ≈ 3.32 × HVL when using exponential attenuation.

Real broad-beam sources, scattered radiation, and build-up factors require professional shielding design.

Approx. TVL (mm): —

Disclaimer. This tool is for education and reference only. It does not replace qualified health physics advice, workplace procedures, or regulatory compliance. Full disclaimer
Register

Forgot password?

My Details

Creating an account with NDTCalc.com allows you to manage your expiring certifications, equipment calibration and automatically generate a CV.

Not joined? Join Here