Photoelectric absorption cross sectional area

Input(s)

Z: Atomic Number (dimensionless)

$E_{\gamma}$: Energy of Gamma Rays $(\mathrm{keV})$

Output(s)

$\alpha_{p e}$: Photoelectric Absorption Cross Sectional Area (barns/electron)

Formula(s)

$$ \alpha_{p e}=12.1 * \frac{Z^{3.6}}{E_{\gamma}^{3.15}} $$

Reference(s)

Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 2, Page: 36.