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Photoelectric Z³ / E³·⁵ scaling

τ₂/τ₁ = 1519

τ2τ1≈(Z2Z1)3(E1E2)3.5\frac{\tau_2}{\tau_1}\approx\left(\frac{Z_2}{Z_1}\right)^3\left(\frac{E_1}{E_2}\right)^{3.5}

Relative photoelectric cross section between two materials or energies.

Laser