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Photoneutron TVL (concrete)

n_TVL = 2.000

x=n TVL,n=log⁡10(H˙unshielded/P)x=n\,\mathrm{TVL},\quad n=\log_{10}(\dot H_{\mathrm{unshielded}}/P)

n_TVL = log₁₀(Ḣ / P). Concrete TVL for giant-resonance neutrons ~ 20–30 cm.

Laser